W91820N [WINBOND]

13-MEMORY TONE/PULSE DIALER WITH HANDFREE, LOCK AND HOLD FUNCTIONS; 13 -MEMORY TONE /带免提,锁定和保持功能脉冲拨号器
W91820N
型号: W91820N
厂家: WINBOND    WINBOND
描述:

13-MEMORY TONE/PULSE DIALER WITH HANDFREE, LOCK AND HOLD FUNCTIONS
13 -MEMORY TONE /带免提,锁定和保持功能脉冲拨号器

电信集成电路 电信电路 脉冲
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中文:  中文翻译
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W91820N SERIES  
13-MEMORY TONE/PULSE DIALER WITH  
HANDFREE, LOCK AND HOLD FUNCTIONS  
GENERAL DESCRIPTION  
The W91820N is a series of tone/pulse switchable telephone dialers with 13 memory, keytone, hold,  
lock, and handfree dialing control features. These chips are fabricated using Winbond's high-  
performance CMOS technology and thus offer good performance in low-voltage, low-power  
operations.  
FEATURES  
· Tone/pulse switchable dialer  
· Two by 32 digits redial and save memory  
· Three by 32 digits one-touch direct repertory memory  
· Ten by 32 digits two-touch indirect repertory memory  
· Pulse-to-tone (*/T) keypad for long distance call operation  
· Chain dialing  
· Uses 5 ´ 5 keyboard  
· Easy operation with redial, flash, pause, and */T keypads  
· Pause, P® T (pulse-to-tone) can be stored as a digit in memory  
· Dialing rate:10 ppS or 20 ppS by mask option  
· Minimum tone output duration: 93 mS (unless W91824N/AN is 87 mS)  
· Minimum intertone pause: 93 mS (unless W91824N/AN is 87mS)  
· Pause time: 3.6 sec. (unless W91824N/AN is 2.0 sec.)  
· Flash break time (73 mS, 100 mS, 300 mS, or 600 mS) selectable by keypad; pause time is 1.0 S  
· Make/break ratio (2:3 or 1:2) selectable by MODE pin  
· Mute key for speech network mute  
· No key will be accepted except the "HOLD" key when in the Hold mode  
· Key tone output for valid keypad entry recognition  
· On-chip power-on reset  
· Uses 3.579545 MHz crystal or ceramic resonator  
· 20, or 22-pin dual-in-line plastic package  
· The different dialers in the W91820N series are shown in the following table:  
TYPE NO.  
W91820N/824N  
W91820AN/824AN  
W91820LN  
PULSE (ppS) LOCK KEY TONE HANDFREE DIALING PACKAGE (PINS)  
10  
10  
10  
10  
20  
20  
-
-
-
20  
22  
20  
22  
20  
22  
Ö
Ö
-
Ö
-
Ö
Ö
-
W91820ALN  
W91822N  
-
Ö
-
Ö
Ö
W91822AN  
-
Ö
Note: W91824N/824AN for French only.  
Publication Release Date: May 1999  
Revision A2  
- 1 -  
W91820N SERIES  
PIN CONFIGURATIONS  
C1  
C2  
C3  
1
2
R4  
22  
20  
19  
18  
C1  
C2  
C3  
1
2
R4  
R3  
21  
20  
19  
3
R2  
R3  
R2  
3
R1  
4
5
C4  
KT  
N.C.  
VDD  
R1  
18  
4
5
17  
16  
C4  
KT  
N.C.  
VDD  
H/P MUTE  
VSS  
6
17  
16  
MODE  
DTMF  
6
15  
14  
H/P MUTE  
VSS  
7
8
MODE  
DTMF  
XT  
15  
14  
7
8
DP  
XT  
13  
XT  
T/P MUTE  
HFI  
9
13  
12  
HKS  
HFO  
9
12  
11  
DP  
XT  
10  
11  
HKS  
T/P MUTE  
10  
W91820N/822N  
/824N  
W91820AN/822AN  
/824AN  
C1  
C2  
C3  
1
2
22  
R4  
C1  
C2  
C3  
C4  
1
21  
20  
19  
20  
R4  
R3  
R2  
R1  
2
3
19  
R3  
3
4
5
R2  
C4  
18  
18  
N.C.  
R1  
LOCK  
4
17  
VDD  
5
N.C.  
VDD  
6
H/P MUTE  
VSS  
17  
16  
LOCK  
16  
MODE  
DTMF  
6
H/P MUTE  
VSS  
7
8
15  
7
XT  
XT  
MODE  
DTMF  
15  
14  
14  
8
XT  
13  
9
DP  
9
13  
12  
12  
DP  
XT  
HKS  
HFO  
10  
11  
T/P MUTE  
HFI  
10  
11  
HKS  
T/P MUTE  
W91820LN  
W91820ALN  
- 2 -  
W91820N SERIES  
PIN DESCRIPTION  
SYMBOL 20-PIN 22-PIN I/O  
FUNCTION  
Column-  
Row  
Inputs  
I
1- 4  
&
1- 4  
&
The keyboard input is compatible with a standard 5 ´ 5  
keyboard, an inexpensive single contact (Form A) keyboard,  
and electronic input.  
17- 20 19- 22  
In normal operation, any single button can be pushed to  
produce dual tone, pulses, or functions. Activation of two or  
more buttons will result in no response except for a single  
tone.  
XT  
XT  
8
8
I
A built-in inverter together with an inexpensive 3.579545 MHz  
crystal supplies the oscillator. The oscillator stops when there  
is no keypad input. The crystal frequency deviation is 0.02%.  
9
9
O
O
Crystal oscillator output pin.  
T/P  
10  
10  
The T/P MUTE is a conventional CMOS N-channel open  
drain output.  
MUTE  
The output transistor turns on with a low level during a dialing  
sequence (both pulse and tone mode). Otherwise, it is off.  
N.C.  
16  
14  
18  
16  
-
I
No connect  
MODE  
Connecting the mode pin to VSS places the dialer in tone  
mode.  
Connecting the mode pin to VDD places the dialer in pulse  
mode with an M/B ratio of 40:60.  
Leaving the mode pin floating places the dialer in pulse mode  
with an M/B ratio of 33.3:66.7.  
11  
13  
I
HKS  
The HKS (hook switch) input is used to sense whether the  
handset is on-hook or off-hook.  
In on-hook state, HKS = 1: chip is in sleeping mode, no  
operation.  
In off-hook state, HKS = 0: chip is enabled for normal  
operation.  
HKS pin is pulled to VDD by internal resistor.  
KT  
5
5
O
The key tone output is a conventional CMOS inverter. The  
key tone is generated when any valid key is pressed; the KT  
pin generates a 1.2 KHz square wave at 35 mS. When no key  
is pressed, the KT pin remains in low state.  
(W91820N/8  
20AN/822N/  
824N/822AN  
/824AN only)  
Publication Release Date: May 1999  
- 3 -  
Revision A2  
W91820N SERIES  
Pin Description, continued  
SYMBOL  
20-PIN 22-PIN I/O  
FUNCTION  
5
5
I
The function of this terminal is to prevent "0" dialing and "9"  
dialing under PABX system long distance call control. When  
the first key input after reset is 0 or 9, all key inputs,  
including the 0 or 9 key, become invalid and the chip  
generates no output. The telephone is reinitialized by a  
reset.  
LOCK  
(W91820LN/  
820ALN only)  
The function of the LOCK pin is shown below:  
FUNCTION  
LOCK PIN  
V
DD  
"0", "9" dialing inhibited  
Floating  
Normal dialing Mode  
"0" dialing inhibited  
V
SS  
H/P MUTE  
DP  
6
6
I
The H/P MUTE is a conventional inverter output. During  
pulse dialing, flash break or hold period, this output is active  
high; otherwise, it remains in low state.  
12  
14  
O
N-channel open drain dialing pulse output.  
Flash key will cause DP to be active in either tone mode or  
pulse mode.  
In lock mode, the DP remains low for 300 mS durint off-  
hook delay time.  
The timing diagram for pulse mode is shown in Figure 1(a,  
b).  
DTMF  
13  
15  
O
During pulse dialing, this pin remains in a low state  
regardless of the keypad input. In tone mode, it will output a  
dual or single tone.  
A detailed timing diagram for tone mode is shown in Figure  
2(a, b).  
OUTPUT FREQUENCY  
Actual  
699  
Error %  
+0.28  
Specified  
697  
R1  
R2  
R3  
R4  
C1  
C2  
C3  
766  
848  
-0.52  
-0.47  
+0.74  
+0.57  
-0.30  
-0.34  
770  
852  
948  
941  
1216  
1332  
1472  
1209  
1336  
1477  
VDD, VSS  
15, 7  
17, 7  
I
Power input pins for the dialer chip. VDD is the power and  
VSS is the ground.  
- 4 -  
W91820N SERIES  
Pin Description, continued  
SYMBOL  
HFI  
20-PIN 22-PIN I/O  
11, 12 I, O Handfree control pins.  
FUNCTION  
-
, HFO  
A low pulse on the HFI input pin toggles the handfree  
control state. The status of the handfree control state is  
listed in the following table:  
NEXT STATE  
HFO DIALING  
CURRENT STATE  
HOOK SW. HFO  
INPUT  
-
High  
Low  
Low  
Low  
Low  
Yes  
No  
Low  
HFI  
HFI  
On Hook  
Off Hook  
On Hook  
Off Hook  
Off Hook  
High  
High  
-
Yes  
Yes  
No  
HFI  
Off Hook  
On Hook  
Low  
High  
On Hook High  
Yes  
HFI pin is pulled to VDD by an internal resistor.  
The  
A detailed timing diagram is shown in Figure 3.  
BLOCK DIAGRAM  
XT  
XT  
HKS  
HFI  
SYSTEM CLOCK  
GENERATOR  
CONTROL  
LOGIC  
LOCK  
ROW  
(R1 ~ R4, Vx/R5)  
READ/WRITE  
COUNTER  
MODE  
KEYBOARD  
INTERFACE  
COLUMN  
(C1 ~ C4, Vss)  
T/P MUTE  
KT  
PULSE  
CONTROL  
LOGIC  
RAM  
LOCATION  
LATCH  
DP  
HFO  
H/P MUTE  
ROW & COLUMN  
PROGRAMMABLE  
COUNTER  
D/A  
CONVERTER  
DATA LATCH  
& DECODER  
DTMF  
Publication Release Date: May 1999  
Revision A2  
- 5 -  
W91820N SERIES  
FUNCTIONAL DESCRIPTION  
Keyboard Operation  
C1  
1
C2  
2
C3  
3
C4  
S
VSS  
EM1  
EM2  
EM3  
R1  
R2  
R3  
4
5
6
F4  
A
7
8
9
0
#
R/P  
H
SAVE R4  
Vx/R5  
*/T  
F1  
F2  
F3  
· S: Store function key  
· A: Indirect repertory memory dialing function key  
· H: Hold function key  
· R/P: Redial and pause function key  
· */T: * in tone mode and P® T key in pulse mode  
· SAVE: Save function key for one-touch 32-digit memory  
· EM1, ..., EM3: Emergency one-touch memory key  
· F1, ..., F4: Flash function keys: F1 = 600 mS, F2 = 300 mS, F3 = 73 mS, F4 = 100 mS; all flash  
pause time is 1.0 mS  
Note: D1, ..., Dn, D1`, ..., Dn`, */T, #, Mn: EM1, ..., EM3, Ln: 0- 9  
Normal Dialing  
OFF HOOK (or  
ON HOOK  
&
), D1  
,
D2  
Dn  
, ¼ ,  
HFI  
1. D1, D2, ¼ , Dn will be dialed out.  
2. Dialing length is unlimited, but redial is inhibited if length oversteps 32 digits in normal dialing.  
Redialing Dialing  
OFF HOOK (or  
ON HOOK  
&
,
D1  
,
D2  
Dn , BUSY  
), R/P  
, ¼ ,  
HFI  
Come ON HOOK  
,
OFF HOOK (or ON HOOK  
&
HFI  
The R/P key can execute redial function only as first key-in after off-hook. Otherwise, it will invoke  
the pause function.  
·
The below cases are selected by mask option for W91824N/AN (French version) only.  
In tone mode:  
D1, D2, D3,*(or #), D4, D5, D6  
The chip will only output D1, D2, D3 and ignore *(or #), D4, D5, D6.  
In pulse mode:  
D1, D2, D3, */T, D4, D5, D6  
- 6 -  
W91820N SERIES  
The chip will only output D1,D2,D3 and do not transfer to tone mode. In pulse mode, the # sign  
does not effect.  
Number Store  
1. OFF HOOK (or ON HOOK  
&
), D1  
,
D2 , ..., Dn  
,
S
,
S
,
HFI  
)
EMn (or Ln or SAVE  
A
,
a. The dialing out of D1 to Dn must first be finished before the S key is pressed.  
b. D1, D2, ¼ , Dn will be stored in memory location Mn or saved and then dialed out.  
2. OFF HOOK (or ON HOOK  
&
),  
S
,
D1  
,
D2 , ..., Dn  
,
S
,
HFI  
EMn (or  
A
,
Ln or SAVE  
)
a. D1, D2, ¼ , Dn will be stored in memory location, Mn (or saved), but will not be dialed out.  
b. R/P and */T keys can be stored as a digit in memory, but the R/P key cannot be the  
first digit. In store mode, R/P is the pause function key.  
c. The store mode is released after the store function is executed or when the state of the hook  
switch changes or the flash function is executed.  
Save  
OFF HOOK (or ON HOOK  
a. D1, D2, ..., Dn will be dialed out.  
&
), D1  
,
D2 , ..., Dn  
,
Save  
HFI  
b. If the dialing of D1 to Dn is finished, pressing SAVE will duplicate D1 to Dn to the save  
memory.  
OFF HOOK (or ON HOOK  
&
),  
HFI  
come on OFF HOOK (or ON HOOK  
&
), SAVE  
HFI  
c. D1 to Dn will be dialed out after the SAVE key is pressed.  
Repertory Dialing Procedure  
One-touch direct repertory dialing:  
OFF HOOK (or ON HOOK  
&
), Mn (or SAVE  
)
HFI  
Publication Release Date: May 1999  
Revision A2  
- 7 -  
W91820N SERIES  
Two-touch direct repertory dialing:  
OFF HOOK (or ON HOOK  
&
),  
A
,
Ln  
HFI  
HFI  
Access Pause  
OFF HOOK (or ON HOOK  
&
), D1  
,
D2  
,
R/P  
,
D3 , ..., Dn  
1. The pause function can be stored in memory.  
2. The pause function is executed with normal dialing, redialing or memory dialing.  
3. The pause function timing diagram is shown in Figure 6.  
Pulse-to-tone (*/T)  
OFF HOOK (or ON HOOK  
D2' , ..., Dn'  
&
), D1  
,
D2 , ..., Dn  
,
*/T  
,
D1'  
,
HFI  
,
1. If the mode switch is set in pulse mode, then it will perform  
case a: D1, D2, ---, Dn, Pause (3.6 sec), D1', D2', ---, Dn'  
(Pulse)  
(Tone)  
case b: (only for French version)  
D1, D2, ---, Dn, * , D1', D2', ---, Dn'  
(Pulse)  
(Tone)  
2. If the mode switch is set in tone mode, then the output signal will be:  
D1, D2, ---, Dn, * , D1', D2', ---, Dn'  
(Tone)  
3. It can be reset to pulse mode only if ON HOOK is active. This is because it remains in tone mode  
when the digits have been dialed out.  
4. The function timing diagram is shown in Figure 7.  
Flash  
OFF HOOK (or ON HOOK  
&
), Fn  
HFI  
Fn is pressed, the dialer will execute a flash break time of 600 mS (F1), 300 mS  
1. Fn = F1- F4. If  
(F2), 73 mS (F3) or 100 mS (F4) and a pause time of 1.0 second, after which the next digit is dialed  
out.  
2. The flash key has the first priority of the keyboard function only one flash key will be released to  
the user.  
3. When the flash key is key in, the system will return to the initial state after the flash pause time is  
finished.  
4. The flash function timing diagram is shown in Figure 8.  
- 8 -  
W91820N SERIES  
Cascaded Dialing  
OFF HOOK (or ON HOOK  
&
)
HFI  
1. Normal Dialing  
(1st sequence)  
+
Repertory Dialing  
(2nd sequence)  
+
Normal Dialing  
2. Repertory Dialing  
(1st sequence)  
+
Normal Dialing  
(2nd sequence)  
+
Repertory Dialing  
3. Redialing  
(1st sequence) (2nd sequence)  
Redialing is valid only for the first key-in.  
+
Normal Dialing  
+
Repertory Dialing  
The second sequence should not be operated until the first sequence is dialed out completely.  
ABSOLUTE MAXIMUM RATING  
PARAMETER  
DC Supply Voltage  
SYMBOL  
VDD- VSS  
VIL  
RATING  
-0.3 to +7.0  
VSS -0.3  
UNIT  
V
V
Input/Output Voltage  
VIH  
VDD +0.3  
VSS -0.3  
V
VOL  
V
VOH  
VDD +0.3  
120  
V
Power Dissipation  
PD  
mW  
°C  
°C  
Operation Temperature  
Storage Temperature  
TOPR  
TSTG  
-20 to +70  
-55 to +150  
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability  
of the device.  
Publication Release Date: May 1999  
- 9 -  
Revision A2  
W91820N SERIES  
DC CHARACTERISTICS  
(VDD- VSS = 2.5V, Fosc. = 3.58 MHz, TA = 25° C, all outputs unloaded)  
PARAMETER  
Operating Voltage  
Operating Current  
SYM.  
VDD  
IOP  
CONDITIONS  
MIN. TYP. MAX.  
UNIT  
V
-
2.0  
-
5.5  
0.6  
0.4  
15  
Tone  
Pulse  
-
-
-
0.4  
0.2  
-
mA  
mA  
mA  
Standby Current  
ISB  
HKS = 0, No load &  
No key entry  
Memory Retention Current  
IMR  
-
-
1
mA  
HKS = 1, VDD = 1.0V  
Row group, RL = 5 KW  
Col/Row, VDD = 2.0- 5.5V  
RL = 5 KW, VDD = 2.0- 5.5V  
RL = 5 KW, VDD = 2.0- 5.5V  
VTO = 0.5V  
Tone Output Voltage  
Pre-emphasis  
VTO  
130  
1
150  
170  
3
mVrms  
dB  
2
DTMF Distortion  
THD  
VTDC  
ITL  
-
-30  
-23  
3.0  
-
dB  
DTMF Output DC Level  
DTMF Output Sink Current  
1.0  
0.2  
0.5  
-
-
-
V
mA  
mA  
IPL  
VPO = 0.5V  
-
DP Output Sink Current  
IML  
VMO = 0.5V  
0.5  
-
-
mA  
T/P MUTE Output Sink  
Current  
KT Drive/Sink Current  
IKTH  
IKTL  
VKTH = 2.0V  
VKTL = 0.5V  
VHFH = 2.0V  
VHFL = 0.5V  
VHPH = 2.0V  
VHPL = 0.5V  
VI = 0V  
0.5  
0.5  
0.5  
0.5  
0.5  
0.5  
4
-
-
-
-
-
-
-
-
-
mA  
mA  
mA  
mA  
mA  
mA  
mA  
-
HFO Drive/Sink Current  
IHFH  
IHFL  
-
-
H/P MUTE  
IHPH  
IHPL  
IKD  
-
Drive/Sink Current  
Keypad Input Drive Current  
-
-
RHKS  
300  
500  
KW  
HKS Pull High Resister  
Keypad Input Sink Current  
Keypad Resistance  
IKS  
VI = 2.5V  
200  
-
400  
-
-
mA  
5.0  
KW  
- 10 -  
W91820N SERIES  
AC CHARACTERISTICS  
PARAMETER  
Key-in Debounce  
SYM.  
CONDITIONS  
MIN.  
TYP.  
20  
MAX. UNIT  
TKID  
TKRD  
TOHD  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
mS  
mS  
mS  
mS  
mS  
mS  
mS  
mS  
mS  
Key Release Debounce  
On-hook Debounce  
20  
Lock Mode  
20  
Unlock Mode  
150  
40  
Pre-digit Pause1  
Pre-digit Pause2  
TPDP1  
Mode Pin = VDD  
10 ppS Mode Pin = Floating  
Mode Pin = VDD  
20 ppS Mode Pin = Floating  
33.3  
20  
TPDP2  
16.7  
800  
Inter Digit Pause  
(Auto Dialing)  
TIDP  
10 ppS  
(W91820N/W91820AN/820LN  
/820ALN/824N/824AN only)  
20 ppS  
-
500  
-
mS  
(W91822N/822AN only)  
Interdigit Pause  
(Auto dialing)  
TIDP  
10 ppS  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
800  
500  
40:60  
33.3:66.7  
93  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
mS  
mS  
%
20 ppS  
Make/Break Ratio  
M:B  
Mode Pin = VDD  
Mode Pin = Floating  
%
Tone Output Duration  
Intertone Pause  
TTD  
TITP  
TFB  
-
mS  
mS  
mS  
-
93  
Flash Break Time  
F1  
F2  
F3  
F4  
-
600  
300  
73  
100  
1.0  
Flash Pause Time  
Pause Time  
TFP  
TP  
S
S
-
3.6  
(W91824N/AN only)  
2.0  
S
Key Tone Frequency  
Key Tone Duration  
FKT  
TKTD  
TRP  
-
-
-
1.2  
KHz  
mS  
mS  
35  
One-key Redialing  
Pause Time  
600  
One-key Redialing  
Break Time  
TRB  
-
-
-
2.2  
-
-
S
First Key-in Delay  
TFKD  
Lock only  
300  
mS  
Notes:  
1. Crystal parameters suggested for proper operation are Rs < 100 W, Lm = 96 mH, Cm = 0.02 pF, Cn = 5 pF, Cl = 18 pF,  
Fosc. = 3.579545 MHz ±0.02%.  
2. Crystal oscillator accuracy directly affects these times.  
Publication Release Date: May 1999  
Revision A2  
- 11 -  
W91820N SERIES  
TIMING WAVEFORMS  
HKS  
KEY IN  
DP  
4
2
2
T
T
KID  
KID  
M
M
B
B
T
T
T
IDP  
IDP  
IDP  
T
PDP  
T
PDP  
T/P MUTE  
H/P MUTE  
KT  
LOW  
DTMF  
OSC.  
OSC.  
OSC.  
Figure 1(a). Pulse Mode Tming Diagram (Normal dialing without lock function)  
HKS  
KEY IN  
DP  
300 mS  
4
2
2
TFKD  
TKID  
M
M
B
B
TIDP  
TIDP  
T
IDP  
TPDP  
T/P MUTE  
(long mute)  
H/P MUTE  
DTMF  
LOW  
OSC.  
OSC.  
OSC.  
Figure 1(b). Pulse Mode Timing Diagram (Normal dialing with lock function)  
- 12 -  
W91820N SERIES  
Timing Waveforms, continued  
HKS  
R/P  
KEY IN  
M
M
DP  
B
B
T
T
T
IDP  
IDP  
IDP  
TPDP  
TPDP  
T/P MUTE  
(long mute)  
H/P MUTE  
KT  
DTMF  
OSC.  
LOW  
OSC.  
ON HOOK  
Figure 1(c). Pulse Mode Timing Diagram (Auto dialing without lock)  
300 mS  
HKS  
R/P  
KEY IN  
DP  
M
TFKD  
B
T
TIDP  
IDP  
TPDP  
T/P MUTE  
(long mute)  
H/P MUTE  
LOW  
DTMF  
OSC.  
OSC.  
Figure 1(d).Pulse Mode Timing Diagram (Auto dialing with lock function)  
Publication Release Date: May 1999  
Revision A2  
- 13 -  
W91820N SERIES  
Timing Waveforms, continued  
HKS  
3
2
6
5
KEY IN  
T
KID  
T
T
T
KID  
KRD  
KRD  
T
KRD  
DTMF  
T
TD  
T
T
ITP  
T
ITP  
ITP  
T/P MUTE  
LOW  
H/P MUTE  
KT  
DTMF  
HIGH  
OSC.  
OSC.  
OSC.  
Figure 2(a). Tone Mode Timing Diagram  
300 mS  
3
HKS  
2
6
5
KEY IN  
T
KID  
T
T
KRD  
T
KRD  
KRD  
DTMF  
T
TD  
T
ITP  
T
T
ITP  
ITP  
T/P MUTE  
T
FKD  
LOW  
H/P MUTE  
DP  
HIGH  
OSC.  
OSC.  
OSC.  
Figure 2(b). Tone Mode Timing Diagram (Normal dialing with lock function)  
- 14 -  
W91820N SERIES  
Timing Waveforms, continued  
HKS  
T
T < TOHD  
R/P  
TKID  
KEY IN  
DTMF  
TTD  
T
ITP  
TITP  
T/P MUTE  
LOW  
H/P MUTE  
KT  
DP  
HIGH  
OSC.  
OSC.  
ON HOOK  
Figure 2(c). Tone Mode Timing Diagram (Auto dialing without lock function)  
300 mS  
HKS  
T
T < TOHD  
R/P  
KEY IN  
DTMF  
TTD  
TITP  
T
ITP  
T/P MUTE  
TFKD  
TKID  
LOW  
H/P MUTE  
DP  
HIGH  
OSC.  
OSC.  
Figure 2(d). Tone Mode Timing Diagram (Auto dialing with lock function)  
Publication Release Date: May 1999  
Revision A2  
- 15 -  
W91820N SERIES  
Timing Waveforms, continued  
HKS  
T
T > TOHD  
R/P  
TKID  
KEY IN  
DTMF  
TTD  
TITP  
T/P MUTE  
(return to initial state)  
LOW  
HIGH  
H/P MUTE  
KT  
DP  
OSC.  
OSC.  
ON HOOK  
Figure 2(c). Tone Mode Timing Diagram with On-hook Debounce (Auto dialing)  
HKS  
HFI  
ON HOOK  
OFF HOOK  
H KEY  
HFO  
T/P MUTE  
HIGH  
LOW  
H/P MUTE  
CHIP ENABLE  
Note: The H KEY can not be enabled during chip dissable.  
Figure 3(a)  
- 16 -  
W91820N SERIES  
Timing Waveforms, continued  
OFF HOOK  
HKS  
HFI  
H KEY  
HFO  
T/P MUTE  
HIGH  
H/P MUTE  
CHIP ENABLE  
Figure 3(b)  
Note: The H KEY and HFI inputs will toggle the HFO signal. The first time HFI or H KEY are activated, the HFO signal will go  
high and the previous active input will be neglected.  
ON HOOK  
HKS  
HFI  
H KEY  
HFO  
T/P MUTE  
HIGH  
H/P MUTE  
CHIP ENABLE  
Figure 3(c)  
Note: The HKS signal change of state from high to low will initialize both the HFO and H/P MUTE signals.  
Publication Release Date: May 1999  
Revision A2  
- 17 -  
W91820N SERIES  
Timing Waveforms, continued  
HKS  
T
T<T  
OHD  
4
KEY IN  
DP  
T
KID  
M
B
T
IDP  
T
PDP  
T/P MUTE  
H/P MUTE  
T
FKD  
T
OFD  
T
OHD  
LOW  
DTMF  
OSC.  
OSC.  
OSC.  
CHIP ENABLE  
ON HOOK  
Figure 4. Lock Function Timing Diagram  
LOW  
HKS  
OKR  
KEY IN  
M
T
DP  
RB  
B
T
T
T
IDP  
RP  
IDP  
T
T
KID  
PDP  
T
PDP  
T/P MUTE  
H/P MUTE  
KT  
LOW  
DTMF  
OSC  
.
OSC.  
Figure 5. Pulse Mode One-key Redialing Timing Diagram  
- 18 -  
W91820N SERIES  
Timing Waveforms, continued  
HKS  
4
2
R/P  
2
KEY IN  
DP  
T
KID  
M
M
B
B
T
T
T
IDP  
IDP  
IDP  
T
T
PDP  
PDP  
T/P MUTE  
T
P
H/P MUTE  
KT  
LOW  
DTMF  
OSC  
.
OSC.  
Figure 6. Pause Function Timing Diagram  
HKS  
KEY IN  
DP  
4
2
*/T  
M
8
T
KID  
M
B
B
T
T
IDP  
IDP  
T
PDP  
T/P MUTE  
T
P
DTMF  
T
ITP  
H/P MUTE  
KT  
OSC.  
OSC.  
Figure 7(a). Pulse to Tone Function Timing Diagram  
Publication Release Date: May 1999  
Revision A2  
- 19 -  
W91820N SERIES  
Timing Waveforms, continued  
HKS  
4
2
*/T  
8
KEY IN  
T
KID  
M
M
DP  
B
B
T
T
IDP  
IDP  
T
PDP  
T/P MUTE  
H/P MUTE  
DTMF  
*
8
T
ITP  
T
ITP  
KT  
OSCILLATION  
OSC.  
Figure 7(b). Pulse to tone function timing diagram (only for French version)  
HKS  
R/P  
KEY IN  
M
M
DP  
T/P MUTE  
H/P MUTE  
B
B
T
T
IDP  
IDP  
T
PDP  
KT  
LOW  
DTMF  
OSC  
.
OSC.  
ON HOOK  
Figure 7(c). Pulse mode auto-redialing timing diagram continue Figure 6(b). (only for French version)  
- 20 -  
W91820N SERIES  
Timing Waveforms, continued  
HKS  
R/P  
KEY IN  
DTMF  
T
KID  
T
TD  
T
ITP  
2
4
T/P MUTE  
H/ P MUTE  
LOW  
HIGH  
KT  
DP  
OSC  
OSC.  
ON HOOK  
Figure 7(d). Tone mode auto-redialing timing diagram continue Figure 6(b). (only for French version)  
LOW  
HKS  
Fn  
KEY IN  
T
KID  
T
FB  
DP  
T/P MUTE  
H/P MUTE  
KT  
LOW  
DTMF  
T
FP  
OSC.  
OSC.  
Figure 8. Flash Operation Timing Diagram  
Publication Release Date: May 1999  
Revision A2  
- 21 -  
W91820N SERIES  
Winbond Electronics (H.K.) Ltd.  
Winbond Electronics North America Corp.  
Winbond Memory Lab.  
Winbond Microelectronics Corp.  
Winbond Systems Lab.  
2727 N. First Street, San Jose,  
CA 95134, U.S.A.  
Headquarters  
No. 4, Creation Rd. III,  
Science-Based Industrial Park,  
Hsinchu, Taiwan  
TEL: 886-3-5770066  
Rm. 803, World Trade Square, Tower II,  
123 Hoi Bun Rd., Kwun Tong,  
Kowloon, Hong Kong  
TEL: 852-27513100  
FAX: 852-27552064  
FAX: 886-3-5792766  
http://www.winbond.com.tw/  
Voice & Fax-on-demand: 886-2-27197006  
TEL: 408-9436666  
FAX: 408-5441798  
Taipei Office  
11F, No. 115, Sec. 3, Min-Sheng East Rd.,  
Taipei, Taiwan  
TEL: 886-2-27190505  
FAX: 886-2-27197502  
Note: All data and specifications are subject to change without notice.  
- 22 -  

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