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PRELIMINARY
HSMMC CONTROLLER
S3C6400X RISC MICROPROCESSOR
27-50
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
Relation between Transfer Complete and Data
Transfer
Complete
Data Timeout
Error
Meaning of the status
0
0
Interrupted by another factor
0
1
Timeout occur during transfer
1
Don’t care
Data transfer complete
‘1’ = Data Transfer Complete
‘0’ = No transfer complete
[0]
Command Complete
This bit is set when get the end bit of the command response. (Except Auto
CMD12) Refer to Command Inhibit (CMD) in the Present State register.
The table below shows that Command Timeout Error has higher priority than
Command Complete. If both bits are set to 1, it can be considered that the
response was not received correctly. (RW1C)
Command
Complete
Command
Timeout Error
Meaning of the status
0
0
Interrupted by another factor
Don’t care
1
Response not received within
64 SDCLK cycles.
1 0
Response
received
‘1’ = Command Complete
‘0’ = No command complete
0
Note:
Host Driver may check if interrupt is actually cleared by polling or monitoring the INTREQ port. If HCLK is
much faster than SDCLK, it takes long time to be cleared for the bits actually.
Note :
Card Interrupt status bit keeps previous value until next card interrupt period (level interrupt) and can be
cleared when write to 1 (RW1C).