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Chapter 18 Version 1 ColdFire Debug (CF1_DEBUG)
MCF51QE128 MCU Series Reference Manual, Rev. 3
396 Freescale Semiconductor
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FILL_MEM{_WS} is used with the WRITE_MEM{_WS} command to access large blocks of memory.
An initial WRITE_MEM{_WS} is executed to set up the starting address of the block and write the first
datum. If an initial WRITE_MEM{_WS} is not executed before the first FILL_MEM{_WS}, an illegal
command response is returned. The FILL_MEM{_WS} command stores subsequent operands. The initial
address is incremented by the operand size (1, 2, or 4) and saved in a temporary register. Subsequent
WRITE_MEM{_WS} commands use this address, perform the memory write, increment it by the current
operand size, and store the updated address in the temporary register. If the with-status option is specified,
the core status byte contained in XCSR[31–24] (XCSR_SB) is returned after the write data. The XCSR
status byte reflects the state after the memory write was performed.
0x12
Memory
data[7-0]
host →
target
host →
target
D
L
Y
0x16
Memory
data[15-8]
Memory
data[7-0]
host →
target
host →
target
host →
target
D
L
Y
0x1A
Memory
data[31-24]
Memory
data[23-16]
Memory
data[15-8]
Memory
data[7-0]
host →
target
host →
target
host →
target
host →
target
host →
target
D
L
Y
FILL_MEM.sz_WS
Write memory specified by debug address register with
status, then increment address
Non-intrusive
0x12
Memory
data[7-0]
XCSR_SB
host →
target
host →
target
D
L
Y
target →
host
0x16
Memory
data[15-8]
Memory
data[7-0]
XCSR_SB
host →
target
host →
target
host →
target
D
L
Y
target →
host
0x1A
Memory
data[31-24]
Memory
data[23-16]
Memory
data[15-8]
Memory
data[7-0]
XCSR_SB
host →
target
host →
target
host →
target
host →
target
host →
target
D
L
Y
target →
host