Typewriter User Manual

5- 76 MC68340 USER’S MANUAL MOTOROLA
Table 5-23. BDM Command Summary
Command Mnemonic Description
Read A/D Register
RAREG/RDREG
Read the selected address or data register and return the results
via the serial interface.
Write A/D Register
WAREG/WDREG
The data operand is written to the specified address or data
register.
Read System Register
RSREG
The specified system control register is read. All registers that can
be read in supervisor mode can be read in BDM.
Write System Register
WSREG
The operand data is written into the specified system control
register.
Read Memory Location
READ
Read the sized data at the memory location specified by the long-
word address. The SFC register determines the address space
accessed.
Write Memory Location
WRITE
Write the operand data to the memory location specified by the
long-word address. The DFC register determines the address
space accessed.
Dump Memory Block
DUMP
Used in conjunction with the READ command to dump large blocks
of memory. An initial READ is executed to set up the starting
address of the block and to retrieve the first result. Subsequent
operands are retrieved with the DUMP command.
Fill Memory Block
FILL
Used in conjunction with the WRITE command to fill large blocks of
memory. An initial WRITE is executed to set up the starting
address of the block and to supply the first operand. Subsequent
operands are written with the FILL command.
Resume Execution
GO
The pipeline is flushed and refilled before resuming instruction
execution at the return PC.
Call User Code
CALL
Current PC is stacked at the location of the current SP. Instruction
execution begins at user patch code.
Reset Peripherals
RST
Asserts RESET for 512 clock cycles. The CPU is not reset by this
command. Synonymous with the CPU RESET instruction.
No Operation
NOP
NOP performs no operation and may be used as a null command.
5.6.2.8.4 Read A/D Register (RAREG/RDREG). Read the selected address or data
register and return the results via the serial interface.
Command Format:
1514131211109876543210
001000011000A/D REGISTER
Command Sequence:
RDREG/RAREG
???
XXX
MS RESULT
XXX
"ILLEGAL"
NEXT CMD
LS RESULT
NEXT CMD
"NOT READY"
Operand Data:
None
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
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