ATA20 White Electronic Designs Corporation, ATA20 Datasheet - Page 41

• Manufacturer Part Number: ATA20
• Description: Density = 8MB-160MB ;; Memory Device = Hitachi Flash ;; Organization = X16/x8 ;; Speed (ns) = 250 ;; Volt = 3/5
• Manufacturer: White Electronic Designs Corporation

June 2000 Rev. 5 – ECO #12935
6. Idle (code: E3H or 97H): This command causes the Card to set BSY, enter the Idle mode, clear BSY
7. Idle Immediate (code: E1H or 95H): This command causes the Card to set BSY, enter the Idle (Read)
8. Initialize Drive Parameters (code: 91H): This command enables the host to set the number of sectors
9. Read Buffer (code: E4H): This command enables the host to read the current contents of the card's
10. Read Multiple (code: C4H): This command performs similarly to the Read Sectors command.
11. Read Long Sector (code: 22H or 23H): This command performs similarly to the Read Sector(s)
12. Read Sector(s) (code: 20H, 21H): This command reads from 1 to 256 sectors as specified in the
13. Read Verify Sector (code: 40H or 41H): This command is identical to the Read Sectors command,
14. Recalibrate (code: 1XH): This command is effectively a NOP command to the Card and is provided
15. Request Sense (code: 03H): This command requests an extended error code after a command ends
16. Seek (code: 7XH): This command is effectively a NOP command to the Card although it does
17. Set Features (code: EFH): This command is used by the host to establish or select certain features.
Feature
01H
55H
66H
81H
BBH
CCH
18. Set Multiple Mode (code: C6H): This command enables the Card to perform Read and Write Multiple
19. Set Sleep Mode (code: E6H or 99H): This command causes the Card to set BSY, enter the Sleep
20. Stand By (code: E2H or 96H): This command causes the Card to set BSY, enter the Sleep mode
7PxxxATA20xxC25
and generate an interrupt. If the sector count is non-zero, the automatic power down mode is enabled.
If the sector count is zero, the automatic power down mode is disabled.
mode, clear BSY and generate an interrupt.
per track and the number of heads per cylinder.
sector buffer.
Interrupts are not generated on each sector, but on the transfer of a block which contains the number of
sectors defined by a Set Multiple command.
command except that it returns 516 bytes of data instead of 512 bytes.
Sector Count register. A sector count of 0 requests 256 sectors. The transfer begins at the sector
specified in the Sector Number register.
except that DRQ is never set and no data is transferred to the host .
for compatibility purposes.
with an error.
perform a range check.
operations and establishes the block count for these commands.
mode, clear BSY and generate an interrupt.
(which corresponds to the ATA "Standby" Mode), clear BSY and return the interrupt immediately.
Operation
Enable 8-bit data transfers.
Disable Read Look Ahead.
Disable Power on Reset (POR) establishment of defaults at Soft Reset.
Enable 8-bit data transfers.
4 bytes of data apply on Read/Write Long commands.
Enable Power on Reset (POR) establishment of defaults at Soft Reset.
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