CY7C68310 CYPRESS [Cypress Semiconductor], CY7C68310 Datasheet - Page 9

• Manufacturer Part Number: CY7C68310
• Manufacturer: CYPRESS [Cypress Semiconductor]

Table 5-1. ATACB Field Descriptions
Document 38-08030 Rev. *H
13-15
Byte
5-12
3
4
bmATACBRegisterSelect
bATACBTransferBlockCount
bATACBTaskFileWriteData
Reserved
Field Name
Bit 0 TaskFileRead - This bit determines whether or not the taskfile register
data selected in bmATACBRegisterSelect is returned. If this bit is set, the
dCBWDataTransferLength field must be set to 8.
0 = Execute ATACB command and data transfer (if any)
1 = Only read taskfile registers selected in bmATACBRegisterSelect and return
0x00h for all others. The format of the 8 bytes of returned data is as follows:
This field controls which of the taskfile register read or write accesses occur.
Taskfile read data will always be 8 bytes in length, and unselected register data
will be returned as 0x00h. Register accesses occur in sequential order as
outlined below (0 to 7):
Bit 0 (3F6h) Device Control / Alternate Status
Bit 1 (1F1h) Features / Error
Bit 2 (1F2h) Sector Count
Bit 3 (1F3h) Sector Number
Bit 4 (1F4h) Cylinder Low
Bit 5 (1F5h) Cylinder High
Bit 6 (1F6h) Device / Head
Bit 7 (1F7h) Command / Status
This value indicates the maximum requested block size in 512-byte incre-
ments. This value must be set to the last value used for the “Sectors per block”
in the SET_MULTIPLE_MODE command. Legal values are 0, 1, 2, 4, 8, 16,
32, 64, and 128 where 0 indicates 256 sectors per block. A command failed
status will be returned if an illegal value is used in the ATACB.
These bytes contain ATA register data used with ATA command or PIO write
operations. Only registers selected in bmATACBRegisterSelect are required to
hold valid data when accessed. The registers are as follows:
These bytes must be set to 0x00h for ATACB commands.
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Address offset 0x00 (3F6h) - Alternate Status
Address offset 0x01 (1F1h) - Features / Error
Address offset 0x02 (1F2h) - Sector Count
Address offset 0x03 (1F3h) - Sector Number
Address offset 0x04 (1F4h) - Cylinder Low
Address offset 0x05 (1F5h) - Cylinder High
Address offset 0x06 (1F6h) - Device / Head
Address offset 0x07 (1F7h) - Command / Status
ATACB Address Offset 0x05h (3F6h) - Device Control
ATACB Address Offset 0x06h (1F1h) - Features
ATACB Address Offset 0x07h (1F2h) - Sector Count
ATACB Address Offset 0x08h (1F3h) - Sector Number
ATACB Address Offset 0x09h (1F4h) - Cylinder Low
ATACB Address Offset 0x0Ah (1F5h) - Cylinder High
ATACB Address Offset 0x0Bh (1F6h) - Device
ATACB Address Offset 0x0Ch (1F7h) - Command
Field Description
CY7C68310
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