
MOTOROLA
7-14
DEVELOPMENT SUPPORT
CPU32
REFERENCE MANUAL
7.2.8.3 Command Set Summary
The BDM command set is summarized in
Table 7-4
. Subsequent paragraphs contain
detailed descriptions of each command.
Table 7-4 BDM Command Summary
Command
Read A/D Register
Mnemonic
RAREG/RDREG
Description
Read the selected address or data register and return
the results via the serial interface.
The data operand is written to the specified address or
data register.
The specified system control register is read. All
registers that can be read in supervisor mode can be
read in BDM.
The operand data is written into the specified system
control register.
Read the sized data at the memory location specified
by the long-word address. The source function code
register (SFC) determines the address space
accessed.
Write the operand data to the memory location
specified by the long-word address. The destination
function code register (DFC) register determines the
address space accessed.
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.
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.
The pipeline is flushed and refilled before resuming
instruction execution at the return PC.
Current PC is stacked at the location of the current SP.
Instruction execution begins at user patch code.
Asserts RESET for 512 clock cycles. The CPU is not
reset by this command. Synonymous with the CPU
RESET instruction.
NOP performs no operation and may be used as a null
command.
Write A/D Register
WAREG/WDREG
Read System Register
RSREG
Write System Register
WSREG
Read Memory Location
READ
Write Memory Location
WRITE
Dump Memory Block
DUMP
Fill Memory Block
FILL
Resume Execution
GO
Call User Code
CALL
Reset Peripherals
RST
No Operation
NOP
F
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