DSPCOMMPCIUM [ETC]
PCI Command Converter for DSP User＇s Manual ; PCI命令转换为DSP用户手册\n
| 型号： | DSPCOMMPCIUM |
| 厂家： | 
ETC |
| 描述： | PCI Command Converter for DSP User＇s Manual
|
| 文件： | 总20页 (文件大小：143K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Freescale Semiconductor, Inc.
DSPCOMMPCIUM/D
Rev. 1.1, 07/1999
™
Suite56 PCI
Command Converter User’s Manual
Motorola, Incorporated
Semiconductor Products Sector
6501 William Cannon Drive West
Austin TX 78735-8598
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Freescale Semiconductor, Inc.
This document contains information on a new product.
© Copyright Motorola, Inc., 1999. All rights reserved.
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no
warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does
Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims
any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may
be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual
performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer
application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the
rights of others. Motorola products are not designed, intended, or authorized for use as components in systems
intended for surgical implant into the body, or other applications intended to support life, or for any other application in
which the failure of the Motorola product could create a situation where personal injury or death may occur. Should
Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify
and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims,
costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of
personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part.
Motorola and
Employer.
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action
All other tradenames, trademarks, and registered trademarks are the property of their respective owners.
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Suite56™ PCI Command Converter
Functional Description
1
2
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1
2
Suite56™ PCI Command Converter
Functional Description
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Table of Contents
Chapter 1
Suite56™ PCI Command Converter
1.1
1.2
1.2.1
1.2.2
1.2.3
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Operating Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Windows PC Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Hewlett Packard Workstation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Sun Ultra Workstation Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Chapter 2
Functional Description
2.1
2.2
2.3
2.4
Command Converter Interface Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Multiple Target Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
TCK Drive and Timing Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Resetting Target DSP Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Motorola
Table of Contents
v
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vi
Suite56™ PCI Command Converter User’s Manual
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List of Figures
1-1
2-1
2-2
2-3
2-4
2-5
Command Converter to Target System Configuration . . . . . . . . . . . . . . . 1-1
Target VDD System JTAG/OnCE™ Interface Connector . . . . . . . . . . . . 2-1
Target Interface Module’s 14-Pin JTAG/OnCE Connector . . . . . . . . . . . 2-2
Multiple JTAG Target Connections (Serial Method) . . . . . . . . . . . . . . . . 2-3
Multiple JTAG Connectors (Parallel Method) . . . . . . . . . . . . . . . . . . . . . 2-4
Reset JTAG Device with RESET Signal . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Motorola
List of Figures
vii
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viii
Suite56™ PCI Command Converter User’s Manual
Motorola
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Chapter 1
Suite56™ PCI Command Converter
The Motorola Suite56™ PCI Command Converter is an interface device that, with the
assistance of the Motorola Suite56 DSP Software Development Tools Debugger, allows
you to send and receive information from your host system to your Motorola DSP based
system. The interface is from the PCI bus on the host system, through a target interface
module, to the DSP via a JTAG connection.
Note:
For more information on the Motorola DSP Suite56 Software Development
Tools Debugger, refer to the Suite56 Software Development Debugger User's
Manual from the Motorola Suite56 Software Development Tools CD or the
DSP Tools website on the World Wide Web at the following web address:
http://www.motorola.com/SPS/DSP/tools/documentation
1.1 General Description
The Suite56 PCI Command Converter is used for designing, debugging, and evaluating
DSP-based systems. Figure 1-1 shows how the Command Converter can be connected in a
target system configuration and used as a hardware evaluation tool or as a software
accelerator.
Target System
Target
25-Pin OCD
Ribbon Cable
Interface
Module
14-Pin Ribbon
JTAG Cable
Host System
Up to 24
Target
14-pin
2 x 7
Connector
Devices
Suite56 PCI
Command Converter
AA2042
Figure 1-1. Command Converter to Target System Configuration
Motorola
Suite56™ PCI Command Converter
1-1
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Operating Environment
The target system in Figure 1-1 can be a Motorola DSP application or evaluation board, or
any user defined target system. The user defined target hardware must have an access
point for the 14-pin JTAG ribbon cable, that may be as simple as a 2-row × 7-set of test
points.
The Suite56 PCI Command Converter provides a physical link between the host system
and the target via a PCI bus connection on the host card. This link translates the high-level
debugger commands into JTAG signals that enable the host system to reset, interrupt, and
send commands to the target DSP.
1.2 Operating Environment
The Motorola DSP Suite56 Software Development Tools used for this Suite56 PCI
Command Converter supports the following three host systems:
• Windows PC
• Hewlett Packard Workstations
• Sun™ Ultra Workstations
1.2.1 Windows PC Requirements
The minimum hardware requirements for using the Motorola DSP Suite56 Software
Development Tools Debugger on a Windows PC include the following:
• Windows PC (Pentium® class processor, or higher)
• Windows® 95 operating system with 16 Mbytes of RAM, Windows® 98 operating
system with 32 Mbytes of RAM, or Windows® NT 4.0 operating system with
32 Mbytes of RAM
• CD-ROM drive
• Hard drive with 50 Mbytes of free space
• Mouse and keyboard
• Free PCI bus slot
1-2
Suite56™ PCI Command Converter User’s Manual
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Operating Environment
1.2.2 Hewlett Packard Workstation Requirements
The minimum hardware requirements for using the Motorola DSP Suite56 Software
Development Tools Debugger on an HP Workstation include the following:
• HP Workstation running HP-UX version 9.05 or 10.20 (or higher)
• 32 Mbytes of RAM
• CD-ROM drive
• Hard drive with 50 Mbytes of free space
• Mouse and keyboard
• Free PCI bus slot
1.2.3 Sun Ultra Workstation Requirements
The minimum hardware requirements for using the Motorola DSP Suite56 Software
Development Tools Debugger on a Sun Ultra Workstation include the following:
• Solaris™ Release 2.5.1 (or higher)
• 32 Mbytes of RAM
• CD-ROM drive
• Hard drive with 50 Mbytes of free space
• Mouse and keyboard
• Free PCI bus slot
Motorola
Suite56™ PCI Command Converter
1-3
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Operating Environment
1-4
Suite56™ PCI Command Converter User’s Manual
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Chapter 2
Functional Description
The Suite56 PCI Command Converter interacts with the target DSP with the assistance of
the Suite56 Software Development Tools Debugger and the user's host system. The host
system interface consists of a program written in the C language that sends commands via
a PCI bus to the Suite56 PCI Command Converter. Commands entered from the host
system's keyboard are parsed, and a series of low-level command packets are sent to the
Suite56 PCI Command Converter. The Suite56 PCI Command Converter translates these
low-level command packets into one or more JTAG signals and OnCE commands that are
transferred to the target DSP via its JTAG port. The JTAG port provides the necessary
control to the target so programs may be loaded or saved, registers read or modified, and
hardware breakpoints set or cleared.
2.1 Command Converter Interface Connector
The target application board must have a 14-pin connector to interface to the command
converter controller. This interface comprises eight signals and three ground connections
on a 7-row × 2-column male pin header, which are spaced on one-tenth inch centers as
illustrated in Figure 2-1 on page 2-1.
10K
TDI/DSI
GND
VCC
2
4
6
1
3
10K
10K
TDO/DSO
GND
TCK/DSCK
GND
5
Vcc
10K
(No Connect)
CC_RESET
7
KEY (No Connect)
8
DSP
TMS0 (For JTAG Devices)
10
9
RESET
PIN
TARGET VDD
(No Connect)
11
13
12
14
10K
TARGET
RESET
CIRCUIT
DEZ
TRST (For JTAG Devices)
VCC
(For JTAG Devices)
Vcc
10K
DSP
TRST
PIN
AA2037
TOP VIEW
Figure 2-1. Target V System JTAG/OnCE™ Interface Connector
DD
Motorola
Functional Description
2-1
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Command Converter Interface Connector
Note:
Figure 3-1 may not represent the exact JTAG/OnCE configuration needed for
every DSP due to possible differences in internal resistors on the pins. Please
see the Data Sheet for your DSP for information on internal resistors.
Since the target system will have a resident reset circuit, an AND gate-in-series is
recommended with the CC_RESET signal. This will allow the target DSP to be reset with
a valid VOL level from either the target-reset circuit or from the command converter. The
pull-down resistors are provided to prevent false signals from being propagated to the
JTAG/OnCE circuit when the test data input/debug serial input (TDI/DSI) and test data
clock/debug serial clock (TCK/DSCK) lines are active. The test data out/debug serial
output (TDO/DSO) pull-up is designed to deassert the Debug Acknowledge signal from
the OnCE circuit
Figure 2-2 is the connector coming from the Target Interface Module via a 14-pin ribbon
cable. When viewed with pin 8 (keyed) on the right side, this plug connector has all odd
numbers on the left side and all even numbers on the right side when viewed from the top.
Spacing between pins is one-tenth inch.
.
TDI/DSI
1
3
2
4
TDO/DSO
TCK/DSCK
GND
5
6
No Connect
CC_RESET
KEY (No Connect)
TMS0 (For JTAG Devices)
No Connect
7
8
9
10
12
14
TARGET V
DEZ
DD
11
13
TRST (For JTAG Devices)
(For JTAG/OnCE Devices)
AA2038
TOP VIEW
Figure 2-2. Target Interface Module’s 14-Pin JTAG/OnCE Connector
2-2
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TCK Drive and Timing Considerations
2.2 Multiple Target Connections
Multiple target devices may be connected in series, allowing a single command converter,
JTAG/OnCE connector to control multiple devices, as in Figure 2-3. Data flows from the
JTAG host, into each JTAG implementation through TDI, out through TDO and into TDI
in the next chip, eventually returning to the JTAG host.
RESET
TRST
TRST RESET
TDI TDO
TCK TMS
TRST RESET
TDI TDO
TCK TMS
TRST RESET
TDI TDO
TCK TMS
TRST RESET
TDI TDO
TRST RESET
TDI TDO
TCK TMS
TRST RESET
TDI TDO
TDO
TDI
TCK TMS
TCK TMS
TCK
TMS
Maximum of 4 Loads on
TCK Circuits
Buffer—74HCT244
or Similar
AA2039
Figure 2-3. Multiple JTAG Target Connections (Serial Method)
2.3 TCK Drive and Timing Considerations
The signals from the command converter are TDO, TCK and TMS, and TRST. The TCK
signal requires fast rise and fall times dictated by the TCK pin timing specification, and
consequently attention must be given to the drive capability of the circuits driving this
signal.
When driving the TCK and TMS circuits with a large number of target devices, the user
must pay attention to the rise and fall times of TCK and TMS. Excessive capacitance may
cause communication problems when driving a single circuit that connects multiple TCK
or multiple TMS input pins. Excessive capacitance can also cause communication
problems with a single circuit connecting multiple TMS input pins.
Acceptable transition times may be achieved for TCK and TMS by driving no more than
four JTAG inputs from each buffered output. This may be achieved with two
configurations.
Figure 2-3 shows one method. Here (in effect) one signal connects each of the TCK
inputs, and one signal connects each of the TMS inputs. A buffer is placed in the circuit
after each fourth input at most, to restore the signal quality for subsequent inputs. The
propagation delay of the buffer is not significant.
Motorola
Functional Description
2-3
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Resetting Target DSP Devices
Figure 2-4 shows two possible configurations of a second method that also enables signal
quality to meet the requirements. In Configuration Number 1, the signal is split and
buffered into a number of parallel TCKn signals. Each of these signals may drive up to
four TCK inputs.
TCK
TCK
TCK
TCK
TCK
TCK
TCK
TCK
TCK
TCK
TCK
TCK
TCK
TCK
1
2
n
TCK
Configuration Number 1 —Fan Out of TCK at Source
TMS
TMS
TMS
TMS
TMS
TMS
TMS
TMS
TMS
TMS
TMS
TMS
TMS
TMS
1
2
n
TMS
AA2040
Configuration Number 2 —Fan Out of TMS at Source
Figure 2-4. Multiple JTAG Connectors (Parallel Method)
In Configuration Number 2, the signal is split and buffered into a number of parallel
TMSn signals. Each of these signals may drive up to four TMS inputs.
Each method is equally valid. The choice of methods will depend on practical
considerations related to each project.
2.4 Resetting Target DSP Devices
The RESET signal and TRST signals from the command converter are typically connected
to all target DSP devices on a JTAG chain. All DSP devices on a JTAG chain connected to
a specific command converter device are reset when RESET and TRST are asserted by the
debugger command FORCE R. Execution control is established immediately after
2-4
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Resetting Target DSP Devices
deassertion of TRST and before any instructions are executed. This sequence of events is
illustrated in Figure 2-5.
(1) Command Converter
Asserts RESET. All
1
Targets Enter Reset.
RESET
TRST
(2) Asserted TRST
1
2
(2A) Deasserted TRST
(3) JTAG Instruction
DEBUG_REQUEST is
Loaded.
Instruction
Register
DEBUG_REQ
(4) Command Converter
Releases RESET. Targets
Exit Reset in Debug Mode.
1
(1)
(2)
2
(2A)
(3)
3
(4)
3
AA2041
Figure 2-5. Reset JTAG Device with RESET Signal
The JTAG controller is still active after deassertion of TRST during reset and while
RESET is held low. The JTAG special instruction DEBUG_REQ is clocked in before
RESET is deasserted. When RESET is deasserted, the device is immediately in Debug
mode, and no instructions are executed in the DSP.
Motorola
Functional Description
2-5
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Resetting Target DSP Devices
2-6
Suite56™ PCI Command Converter User’s Manual
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Suite56™ PCI Command Converter
Functional Description
1
2
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1
2
Suite56™ PCI Command Converter
Functional Description
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