W83697HF/F
(Bit 3):
HEAD#
This bit indicates the value of
output.
HEAD#
0
1
side 1
side 0
INDEX (Bit 2):
This bit indicates the complement of INDEX# output.
WP (Bit 1):
0
1
disk is not write-protected
disk is write-protected
(Bit 0)
DIR#
This bit indicates the direction of head movement.
0
1
inward direction
outward direction
3.2.2
Status Register B (SB Register) (Read base address + 1)
This register is used to monitor several disk interface pins in PS/2 and Model 30 modes. In PS/2 mode,
the bit definitions for this register are as follows:
2
1
7
1
6
5
4
3
0
1
MOT EN A
MOT EN B
WE
RDATA Toggle
WDATA Toggle
Drive SEL0
Drive SEL0 (Bit 5):
This bit indicates the status of DO REGISTER bit 0 (drive select bit 0).
WDATA Toggle (Bit 4):
This bit changes state at every rising edge of the
output pin.
WD#
RDATA Toggle (Bit 3):
This bit changes state at every rising edge of the
output pin.
RDATA#
WE (Bit 2):
This bit indicates the complement of the
output pin.
WE#
Publication Release Date: Feb. 2002
Revision 0.70
- 36 -
WINBOND [ WINBOND ]
