10-24
DSP56309UM/D MOTOROLA
On-Chip Emulation Module
OnCE Module Examples
device. The events such as select-DR, select-IR, update-DR, and shift-DR refer to
bringing the JTAG TAP in the corresponding state. For a detailed description of the
JTAG protocol, see
10.12.1
Checking Whether the Chip Has Entered Debug Mode
There are two methods to verify that the chip has entered debug mode:
¥ Every time the chip enters debug mode, a pulse is generated on the DE signal. A
pulse is also generated every time the chip acknowledges the execution of an
instruction while in debug mode. An external command controller can connect
the DE line to an interrupt signal in order to sense the acknowledge.
¥ An external command controller can poll the JTAG instruction shift register for
the status bits OS[1:0]. When the chip is in Debug mode, these bits are set to the
value 11.
Note:
In the following paragraphs, the ACK notation denotes the operation
performed by the command controller to check whether debug mode has been
entered (either by sensing DE or by polling JTAG instruction shift register).
10.12.2
Polling the JTAG Instruction Shift Register
In order to poll the core status bits in the JTAG instruction shift register the following
sequence must be performed:
1. Select shift-IR. Passing through capture-IR loads the core status bits into the
instruction shift register.
2. Shift in ENABLE_ONCE. While shifting-in the new instruction, the captured
status information is shifted-out. Pass through update-IR.
3. Return to Run-Test/Idle.
The external command controller can analyze the information shifted out and detect
whether the chip has entered debug mode.
Содержание DSP56309
Страница 25: ...xxii DSP56309UM D MOTOROLA Figure D 25 Port E Registers PCRE PRRE PDRE D 39 ...
Страница 30: ...MOTOROLA DSP56309UM D 1 1 SECTION 1 DSP56309 OVERVIEW ...
Страница 47: ...1 18 DSP56309UM D MOTOROLA DSP56309 Overview DSP56309 Architecture Overview ...
Страница 48: ...MOTOROLA DSP56309UM D 2 1 SECTION 2 SIGNAL CONNECTION DESCRIPTIONS ...
Страница 85: ...2 38 DSP56309UM D MOTOROLA Signal Connection Descriptions OnCE JTAG Interface ...
Страница 86: ...MOTOROLA DSP56309UM D 3 1 SECTION 3 MEMORY CONFIGURATION ...
Страница 104: ...MOTOROLA DSP56309UM D 4 1 SECTION 4 CORE CONFIGURATION ...
Страница 124: ...MOTOROLA DSP56309UM D 5 1 SECTION 5 GENERAL PURPOSE I O ...
Страница 125: ...5 2 DSP56309UM D MOTOROLA General Purpose I O 5 1 INTRODUCTION 5 3 5 2 PROGRAMMING MODEL 5 3 ...
Страница 128: ...MOTOROLA DSP56309UM D 6 1 SECTION 6 HOST INTERFACE HI08 ...
Страница 166: ...MOTOROLA DSP56309UM D 7 1 SECTION 7 ENHANCED SYNCHRONOUS SERIAL INTERFACE ESSI ...
Страница 212: ...MOTOROLA DSP56309UM D 8 1 SECTION 8 SERIAL COMMUNICATION INTERFACE SCI ...
Страница 241: ...8 30 DSP56309UM D MOTOROLA Serial Communication Interface SCI GPIO Signals and Registers ...
Страница 242: ...MOTOROLA DSP56309UM D 9 1 SECTION 9 TRIPLE TIMER MODULE ...
Страница 269: ...9 28 DSP56309UM D MOTOROLA Triple Timer Module Timer Operational Modes ...
Страница 270: ...MOTOROLA DSP56309UM D 10 1 SECTION 10 ON CHIP EMULATION MODULE ...
Страница 302: ...MOTOROLA DSP56309UM D 11 1 SECTION 11 JTAG PORT ...
Страница 369: ...C 22 DSP56309UM D MOTOROLA DSP56309 BSDL Listing ...
Страница 370: ...MOTOROLA DSP56309UM D D 1 APPENDIX D PROGRAMMING REFERENCE ...
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