Freescale Semiconductor, Inc.
Result Data:
The contents of the selected register are returned as a long-word value. The data is
returned most significant word first.
5.6.2.8.5 Write A/D Register (WAREG/WDREG). The operand (long-word) data is written
to the specified address or data register. All 32 bits of the register are altered by the write.
Command Format:
15
0
14
0
13
1
12
0
11
0
10
0
9
0
8
0
7
1
6
0
5
0
4
0
3
2
0
A/D
REGISTER
Command Sequence:
WDREG/WAREG
???
MS DATA
"NOT READY"
LS DATA
"NOT READY"
NEXT CMD
"CMD COMPLETE"
XXX
NEXT CMD
"ILLEGAL"
"NOT READY"
Operand Data:
Long-word data is written into the specified address or data register. The data is
supplied most significant word first.
Result Data:
Command complete status ($0FFFF) is returned when register write is complete.
5.6.2.8.6 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. Several internal
temporary registers are also accessible.
Command Format:
15
0
14
0
13
1
12
0
11
0
10
1
9
0
8
0
7
1
6
0
5
0
4
0
3
0
REGISTER
Command Sequence:
RSREG
???
XXX
MS RESULT
NEXT CMD
LS RESULT
XXX
NEXT CMD
"ILLEGAL"
"NOT READY"
Operand Data:
None
MOTOROLA
MC68340 USER’S MANUAL
5- 77
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