Samsung S3C6400X User Manual page 928

HSMMC CONTROLLER
Occurs when detecting that the end bit of a command response is 0.
'1' = End bit Error generated
'0' = No Error
Command CRC Error
[1]
Command CRC Error is generated in two cases.
(1) If a response is returned and the Command Timeout Error is set to 0
(indicating no timeout), this bit is set to 1 when detecting a CRC error in the
command response.
(2) The Host Controller detects a CMD line conflict by monitoring the CMD line
when a command is issued. If the Host Controller drives the CMD line to 1 level,
but detects 0 levels on the CMD line at the next SDCLK edge, then the Host
Controller will abort the command (Stop driving CMD line) and set this bit to 1.
The Command Timeout Error shall also be set to 1 to distinguish CMD line
conflict.
'1' = CRC Error generated
'0' = No Error
Command Timeout Error
[0]
Occurs only if no response is returned within 64 SDCLK cycles from the end bit
of the command. If the Host Controller detects a CMD line conflict, in which case
Command CRC Error shall also be set as shown in Table 33, this bit shall be
set without waiting for 64 SDCLK cycles because the command will be aborted
by the Host Controller.
'1' = Timeout
'0' = No Error
The relation between Command CRC Error and Command Timeout Error is shown in Table below.
Command CRC Error
0
0
1
1
The relation between Command CRC Error and Command Timeout Error
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
27-52
Specifications and information herein are subject to change without notice.
Command Timeout
Error
0
1
0
1
S3C6400X RISC MICROPROCESSOR
Kinds of error
No Error
Response Timeout Error
Response CRC Error
CMD line conflict
0
0