FDC37M60X SMSC Corporation, FDC37M60X Datasheet - Page 15
FDC37M60X
Manufacturer Part Number
FDC37M60X
Description
ENHANCED SUPER I/O CONTROLLER WITH INFRARED SUPPORT
Manufacturer
SMSC Corporation
Datasheet
1.FDC37M60X.pdf
(182 pages)
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STATUS REGISTER B (SRB)
Address 3F1 READ ONLY
This register is read-only and monitors the state
of several disk interface pins
PS/2 Mode
BIT 0 MOTOR ENABLE 0
Active high status of the MTR0 disk interface
output pin. This bit is low after a hardware reset
and unaffected by a software reset.
BIT 1 MOTOR ENABLE 1
Active high status of the MTR1 disk interface
output pin. This bit is low after a hardware reset
and unaffected by a software reset.
BIT 2 WRITE GATE
Active high status of the WGATE disk interface
output.
BIT 3 READ DATA TOGGLE
Every inactive edge of the RDATA input causes
this bit to change state.
RESET
COND.
7
1
1
6
1
1
in PS/2 and
DRIVE
SEL0
5
0
TOGGLE
WDATA
4
0
15
Model 30 modes. The SRB can be accessed at
any time when in PS/2 mode.
mode the data bus pins D0 - D7 are held in a
high impedance state for a read of address 3F1.
BIT 4 WRITE DATA TOGGLE
Every inactive edge of the WDATA input causes
this bit to change state.
BIT 5 DRIVE SELECT 0
Reflects the status of the Drive Select 0 bit of
the DOR (address 3F2 bit 0). This bit is cleared
after a hardware reset and it is unaffected by a
software reset.
BIT 6 RESERVED
Always read as a logic "1".
BIT 7 RESERVED
Always read as a logic "1".
TOGGLE
RDATA
3
0
WGATE
2
0
MOT
EN1
1
0
MOT
EN0
In the PC/AT
0
0
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