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MB86R02 'Jade-D' Hardware Manual V1.64
16.5.1.4.3.
The first CMD is a dummy command
When the first CMD is a dummy write, the STATUS byte is immediately returned. The status is
different depending on whether a READ or WRITE is returned. At this point in time, the
transaction is not issued to the AHB. After the STATUS byte replies, this forwarding transaction
is completed.
16.1.1.1.1
When the first CMD is a dummy Write (R/W bit=WRITE)
TxRDY is sent back for dummy WRITE CMD. Refer to Figure Error! No text of specified style
in document.
HOST SCK
HOST XCS
HOST DI
CMD
Dum my Write! (Write)
HOST DO
(Wri teSts
16.1.1.1.2
When the first CMD is a dummy Read (R/W bit=Read)
RxRDY is sent back for dummy READ CMD. Refer to Figure Error! No text of specified style
in document.
HOST SCK
HOST XCS
HOST DI
CMD
Dum my Write! (Read)
HOST DO
(Rea dSts
16.5.1.4.4.
The first CMD is a reset request
If the first CMD is a dummy RESET command, the HOSTIF module is reset at once although the
response has begun. Please send the reset frame after the reset request.
16-12
STATUS
1
)
Figure 16-17 Dummy Write (R/W bit=WRITE)
STATUS
1
)
Figure 16-18 Dummy Read (R/W bit= READ)
ABL1 ABL0 DBL2 DBL1 DBL0 R/W CNT1 CNT0
0
0
0
1
x
x
0
Dummy Wri te
Wri te
ABL1 ABL0 DBL2 DBL1 DBL0 R/W CNT1 CNT0
0
0
0
0
x
x
0
Dummy Write
Rea d
0
Rx
Tx
SERR
RDY
RDY
1
0
0
1
1
1
1
1
Wri teSts
0
Rx
Tx
SERR
RDY
RDY
1
0
0
1
1
1
1
Rea dSts 1
1
1
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