Interface
5-14 C141-E088-01EN
When the BSY bit is 1 or the DRQ bit is 1 (the device is requesting the data
transfer) and the host system writes to the command register, the correct device
operation is not guaranteed.
5.3.1 Command code and parameters
Table 5.3 lists the supported commands, command code and the registers that
needed parameters are written.
Table 5.3 Command code and parameters (1 of 2)
Command code (Bit)
Parameters used
76543210FR SC SN CY DH
READ SECTOR(S)
0010000RNYYY Y
READ MULTIPLE
11000100NYYY Y
READ DMA
1100100RNYYY Y
READ VERIFY SECTOR(S)
0100000RNYYY Y
WRITE MULTIPLE
11000101NYYY Y
WRITE DMA
1100101RNYYY Y
WRITE VERIFY
00111100NYYY Y
WRITE SECTOR(S)
0011000RNYYY Y
RECALIBRATE 0 0 0 1 XXXXNNNND
SEEK 0 1 1 1 XXXXNNYY Y
INITIALIZE DEVICE PARAMETERS
10010001NYNN Y
IDENTIFY DEVICE
11101100N N N N D
IDENTIFY DEVICE DMA
11101100NNNN D
SET FEATURES
11101111YN* N N D
SET MULTIPLE MODE
11000110N Y N N D
SET MAX ADDRESS
11111001NYYY Y
READ NATIVE MAX ADDRESS
11111000NNNN D
EXECUTE DEVICE DIAGNOSTIC
10010000NNNND*
READ LONG
0010001RNYYY Y
WRITE LONG
0011001RNYYY Y
READ BUFFER
11100100NNNN D
WRITE BUFFER
11101000NNNN D
IDLE
1
1
0
1
0
1
1
0
0
0
1
0
1
1
1
1NYNN D
Command name