SDI Technologies SDIO Card User Manual
Page 34
©Copyright 2002-2006 SD Card Association
SDIO Card Bluetooth Type-A Simplified Specification Version 1.00
27
5.3.6 Read Flow for the Card with Unnecessary Read Acknowledge (RTC=1) – CRC
Error (Byte Basis Transfer Mode)
Figure 18 – Read Flow for the Card with Unnecessary Read Acknowledge (RTC=1) – CRC
Error (Byte Basis Transfer Mode)
CMD
DAT
Packet Data n
Packet Data (n+1)
Packet Data (n+1)
CMD
DAT2, 3
DAT1
DAT0
Interface data1
Header
Data
+CRC
Data
+CRC
Header
CRC Error
CRC Error Occur!
Set Retry
Retry
Retry
Retry
Retry
PCRRT: Packet Read Retry
R: Response
Int
Int
Int
Int. clr
Int. clr
Int. clr
Set Retry
Int
Int. clr
Interrupt
Don't
send Ack
.
Don't
send Ack
.
53
53
53
52
53
53
52
52
53
53
53
52
52
D
D
D
D
D
D
D
D
CMD53 (R)
Receive Buff.
R
CMD53 (R)
Receive Buff.
R
R
CMD53 (R)
Receive Buff.
R
CMD52 (W)
Int. Clear
R
READ from SDIO Card Type-A for Bluetooth
Register 0x00 is prohibited during this period
to avoid destroying data that is being retried.
Data+CRC
Data+CRC
Data
+CRC
Data
+CRC
Data
+CRC
Data
+CRC
Data+CRC
CMD52 (W)
PCRRT -> 1