HANBit
HFDOM40KVxxx
Implementation Note:
Conflicts may occur on the host data bus when this bit is provided by a Floppy Disk Controller
operating at the same addresses as the CompactFlash Storage Card. Following are some
possible solutions to this problem for the PCMCIA implementation:
1) Locate the CompactFlash Storage Card at a non-conflicting address, i.e. Secondary
address (377) or in an independently decoded Address Space when a Floppy Disk Controller
is located at the Primary addresses.
2) Do not install a Floppy and a CompactFlash Storage Card in the system at the same time.
3) Implement a socket adapter, which can be programmed to (conditionally) tri-state D7 of I/0
address 3F7h/377h when a Compact Flash Storage Card is installed and conversely to tri-state
D6-D0 of I/O address 3F7h/377h when a floppy controller is installed.
4) Do not use the CompactFlash Storage Card’s Drive Address register. This may be
accomplished by either a) If possible, program the host adapter to enable only I/O addresses
1F0h-1F7h, 3F6h (or 170h-177h, 176h) to the CompactFlash Storage Card or b) if provided
use an additional Primary / Secondary configuration in the CompactFlash Storage Card
which does not respond to accesses to I/O locations 3F7h and 377h. With either of these
implementations, the host software must not attempt to use information in the Drive Address
Register.
Bit 6 (-WTG): this bit is 0 when a write operation is in progress, otherwise, it is 1.
Bit 5 (-HS3): this bit is the negation of bit 3 in the Drive/Head register.
Bit 4 (-HS2): this bit is the negation of bit 2 in the Drive/Head register.
Bit 3 (-HS1): this bit is the negation of bit 1 in the Drive/Head register.
Bit 2 (-HS0): this bit is the negation of bit 0 in the Drive/Head register.
Bit 1 (-nDS1): this bit is 0 when drive 1 is active and selected.
Bit 0 (-nDS0): this bit is 0 when the drive 0 is active and selected.
4. ATA COMMAND
CF-ATA Command Set
Table summarizes the CF-ATA command set with the paragraphs that follow describing the
individual commands and the task file for each.
Table:CF-ATA Command Set
Class
COMMAND
Code
FR
-
SC
-
SN
-
CY
-
DH
D
D
Y
LBA
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Check Power Mode
E5h or 98h
-
-
Execute Drive Diagnostic 90h
-
-
-
-
Format Track
Identify Drive
Idle
50h
-
Y
-
-
Y
-
Y
-
ECh
-
-
D
D
D
Y
E3h or 97h
E1h or 95h
-
Y
-
-
-
-
Idel Immediate
-
-
-
-
Initialize Drive Parameters 91h
-
Y
-
-
-
-
Read Buffer
E4h
-
-
-
D
Y
-
Read Long Sector
Read Multiple
Read Sector(s)
Read Verify Sector(s)
Recalibrate
22h or 23h
C4h
-
-
Y
Y
Y
Y
-
Y
Y
Y
Y
-
Y
Y
Y
Y
-
-
Y
Y
Y
-
Y
20h or 21h
40h or 41h
1Xh
-
Y
-
Y
-
D
D
Y
Request Sence
Seek
03h
-
-
-
-
-
7Xh
-
-
Y
-
Y
-
Y
-
Set Features
EFh
Y
-
-
D
D
Set Multiple Mode
C6h
Y
-
-
-
URL:www.hbe.co.kr
13 / 13
HANBit Electronics Co., Ltd.
Rev. 1.1 (December, 2003)
HANBIT [ HANBIT ELECTRONICS CO.,LTD ]
