mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 1294

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

Functional Description
(STATUS)
1294
SYNC
ACK_DISABLE
ACK_ENABLE
BACKGROUND
DUMP_MEM.sz
DUMP_MEM.sz_WS
Command
Mnemonic
/
d
ad24
rd8
rd16
rd32
rd.sz
wd8
wd16
wd32
wd.sz
ss
sz
crn
WS
=
=
=
=
=
=
=
=
=
=
=
=
=
=
=
Always Available
Always Available
Always Available
Classification
Non-Intrusive
Non-Intrusive
Non-Intrusive
Command
MCF51JF128 Reference Manual, Rev. 2, 03/2011
separates parts of the command
delay 32 target BDC clock cycles
24-bit memory address in the host-to-target direction
8 bits of read data in the target-to-host direction
16 bits of read data in the target-to-host direction
32 bits of read data in the target-to-host direction
read data, size defined by sz, in the target-to-host direction
8 bits of write data in the host-to-target direction
16 bits of write data in the host-to-target direction
32 bits of write data in the host-to-target direction
write data, size defined by sz, in the host-to-target direction
the contents of XCSR[31:24] in the target-to-host direction
memory operand size (0b00 = byte, 0b01 = word, 0b10 = long)
core register number
command suffix signaling the operation is with status
Table 50-40. BDM Command Summary
Table continues on the next page...
if Enb?
ACK
Yes
Yes
Yes
N/A
No
No
1
Preliminary
(0x33+4 x sz)/d/ss/rd.sz
(0x32+4 x sz)/d/rd.sz
Command
Structure
0x03/d
0x02/d
0x04/d
N/A
2
Request a timed reference pulse to
determine the target BDC
communication speed
Disable the communication
handshake. This command does
not issue an ACK pulse.
Enable the communication
handshake. Issues an ACK pulse
after the command is executed.
Halt the CPU if ENBDM is set.
Otherwise, ignore as illegal
command.
Dump (read) memory based on
operand size (sz). Used with
READ_MEM to dump large blocks
of memory. An initial READ_MEM is
executed to set up the starting
address of the block and to retrieve
the first result. Subsequent
DUMP_MEM commands retrieve
sequential operands.
Dump (read) memory based on
operand size (sz) and report status.
Used with READ_MEM{_WS} to
dump large blocks of memory. An
initial READ_MEM{_WS} is
executed to set up the starting
address of the block and to retrieve
the first result. Subsequent
DUMP_MEM{_WS} commands
retrieve sequential operands.
Description
Freescale Semiconductor, Inc.