Fujitsu MB86R02 Jade-D Hardware Manual page 302

MB86R02 'Jade-D' Hardware Manual V1.64
The CMD and STATUS bytes are described as follows:
CMD byte
ABL: Address Byte Length as shown by using a 2 bit code for 1 to 4 bytes
DBL: Data Byte Length as shown by using 3 bit code for 1 to 16 bytes
DBL2 DBL1
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
R/W: Specifies read or write. "1" is a write.
STATUS byte
The write status is shown by the TxRDY bit of the STATUS byte. When write processing is
completed and the next transmission is possible, "1" is shown in the TxRDY bit.
The flow of a write action is shown below.
DBL0 Data Length
Dummy Writes.
0
1 1
0 2
1 4
0 8
1 12
0 16
1 16
Figure 16-3 Write process flow
AHB HSIZE AHB HBURST
no access no access
Byte SINGLE
Half word SINGLE
1 word SINGLE
2 word INCR
3 word INCR
4 word INCR4
4 word INCR4
16-3