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SDP3B FlashDisk Product Manual
4.4.2
Configuration Option Register (Address
200h in Attribute Memory)
The Configuration Option Register is used to
configure the cards interface, address decoding and
interrupt and to issue a soft reset to the SDP3B
FlashDisk.
Operation
D7
R/W
SRESET
SRESET
Soft Reset - Setting this bit to one (1), waiting the minimum reset width time and returning to zero
(0) places the SDP3B FlashDisk in the Reset state. Setting this bit to one (1) is equivalent to
assertion of the +RESET signal except that the SRESET bit is not cleared. Returning this bit to
zero (0) leaves the SDP3B FlashDisk in the same un-configured, Reset state as following power-
up and hardware reset. This bit is set to zero (0) by power-up and hardware reset. Using the
PCMCIA Soft Reset is considered a hard Reset by the ATA Commands. Contrast with Soft Reset
in the Device Control Register.
LevlREQ
This bit is set to one (1) when Level Mode Interrupt is selected, and zero (0) when Pulse Mode is
selected. Set to zero (0) by Reset.
Conf5 - Conf0
Configuration Index. Set to zero (0) by reset. It's used to select operation mode of the SDP3B
FlashDisk as shown below.
Note:
Table 4-13 Card Configurations
Conf5
Conf4
0
0
0
0
0
0
0
0
4.4.3
Card Configuration and Status Register
(Address 202h in Attribute Memory)
The Card Configuration and Status Register
contains information about the Card's condition.
Card Configuration and Status Register Organization:
Operation
D7
Read
Changed
Write
0
40
D6
D5
LevlREQ
Conf5
Conf5 and Conf4 are reserved and must be written as zero (0).
Conf3
Conf2
Conf1
0
0
0
0
0
0
0
0
1
0
0
1
D6
D5
SigChg
IOis8
SigChg
IOis8
SanDisk SDP3B FlashDisk Product Manual © 1998 SANDISK CORPORATION
D4
D3
D2
Conf4
Conf3
Conf2
Conf0
Disk Card Mode
0
Memory Mapped
1
I/O Mapped, Any 16 byte system
decoded boundary
0
I/O Mapped, 1F0-1F7/3F6-3F7
1
I/O Mapped, 170-177/376-377
D4
D3
D2
0
0
PwrDwn
0
0
PwrDwn
D1
D0
Conf1
Conf0
D1
D0
Int
0
0
0
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