FDC37C669-MS Standard Microsystems (SMSC), FDC37C669-MS Datasheet - Page 22

• Manufacturer Part Number: FDC37C669-MS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37C669-MS

• Pin Count: 100
• Lead Free Status / RoHS Status: Compliant

PS/2 Model 30 Mode
BIT 0 nDRIVE SELECT 2
Active low status of the DS2 disk interface output.
BIT 1 nDRIVE SELECT 3
Active low status of the DS3 disk interface output.
BIT 2 WRITE GATE
Active high status of the latched WGATE output signal.
This bit is latched by the active going edge of WGATE
and is cleared by the read of the DIR register.
BIT 3 READ DATA
Active high status of the latched RDATA output signal.
This bit is latched by the inactive going edge of RDATA
and is cleared by the read of the DIR register.
RESET
COND.
nDRV2
N/A
7
nDS1
6
1
nDS0
5
1
WDATA
F/F
4
0
22
RDATA
F/F
3
0
BIT 4 WRITE DATA
Active high status of the latched WDATA output signal.
This bit is latched by the inactive going edge of WDATA
and is cleared by the read of the DIR register. This bit is
not gated with WGATE.
BIT 5 nDRIVE SELECT 0
Active low status of the DS0 disk interface output.
BIT 6 nDRIVE SELECT 1
Active low status of the DS1 disk interface output.
BIT 7 nDRV2
Active low status of the DRV2 disk interface input.
WGATE
F/F
2
0
nDS3
1
1
nDS2
0
1