3 read memory location (read), Command format: command sequence – Freescale Semiconductor MCF5480 User Manual
Page 286

MCF548x Reference Manual, Rev. 3
8-36
Freescale Semiconductor
Command Format:
Command Sequence
Figure 8-26.
WAREG
/
WDREG
Command Sequence
Operand Data
Longword data is written into the specified address or data register. The data is
supplied most-significant word first.
Result Data
Command complete status is indicated by returning 0xFFFF (with S cleared)
when the register write is complete.
8.5.3.3.3
Read Memory Location (
READ
)
Read data at the longword address. Address space is defined by BAAR[TT,TM]. Hardware forces
low-order address bits to zeros for word and longword accesses to ensure that word addresses are
word-aligned and longword addresses are longword-aligned.
Command/Result Formats:
15
12
11
8
7
4
3
2
0
0x2
0x0
0x8
A/D
Register
D[31:16]
D[15:0]
Figure 8-25.
WAREG
/
WDREG
Command Format
WAREG/WDREG
???
LS DATA
’NOT READY’
NEXT CMD
’NOT READY’
XXX
BERR
MS DATA
’NOT READY’
NEXT CMD
’CMD COMPLETE’