dsp56000 Freescale Semiconductor, Inc, dsp56000 Datasheet - Page 212

• Manufacturer Part Number: dsp56000
• Description: 24-bit Digital Signal Processor Family Manual
• Manufacturer: Freescale Semiconductor, Inc

10.11.3 Displaying X Memory Area Starting From Address XXXX
This command uses R0 to minimize serial traffic.
MOTOROLA
6. ACK
7. CLK
1. Send command WRITE PDB REGISTER, GO, no EX (01001001).
2. ACK
3. Send the 24-bit DSP56K opcode: “MOVE R0,x:OGDB”
4. ACK
5. Send command READ GDB REGISTER (10001001)
6. ACK
7. CLK
8. Send command WRITE PDB REGISTER, no GO, no EX (00001001)
9. ACK
10. Send the 24-bit DSP56K opcode: “MOVE #$xxxx,R0”
11. ACK
12. Send command WRITE PDB REGISTER, GO, no EX (01001001)
13. ACK
14. Send the 24-bit 2
The OnCE controller selects GDB as source for serial data.
The OnCE controller selects PDB as destination for serial data.
After 24 bits have been received the PDB register drives the PDB. The OnCE con-
troller releases the chip from the debug mode and the contents of R0 are loaded
in the GDB REGISTER. The signal that marks the end of the instruction returns the
chip to the debug mode.
The OnCE controller selects GDB as source for serial data.
The external command controller generates 24 clocks that shift out the contents of
the GDB register. The value of R0 is thus saved and should be restored before ex-
iting the debug mode.
OnCE controller selects PDB as destination for serial data.
After 24 bits have been received, the PDB register drives the PDB. The OnCE con-
troller causes the processor to load the opcode.
The OnCE controller selects PDB as destination for serial data.
After 24 bits have been received, the PDB register drives the PDB. The OnCE con-
Freescale Semiconductor, Inc.
nd
For More Information On This Product,
word of: “MOVE #$xxxx,R0” (the xxxx field).
ON-CHIP EMULATION (OnCE)
Go to: www.freescale.com
USING THE OnCE
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