FDC37C672QFP SMSC Corporation, FDC37C672QFP Datasheet - Page 133

• Manufacturer Part Number: FDC37C672QFP
• Description: ENHANCED SUPER I/O CONTROLLER WITH FAST IR
• Manufacturer: SMSC Corporation

Enhanced Super I/O Controller with Fast IR
Datasheet
SMSC FDC37C672
FDD Mode Register
Default = 0x0E
on Vcc POR or
Reset_Drv
FDD Option Register
Default = 0x00
on Vcc POR or
Reset_Drv
FDD Type Register
Default = 0xFF
on Vcc POR or
Reset_Drv
NAME
Table 19.7 - Floppy Disk Controller, Logical Device 0 [Logical Device Number = 0x00]
REG INDEX
0xF0 R/W
0xF1 R/W
0xF2 R/W
0xF3 R
Bit[0] Floppy Mode
= 0
= 1
Bit[1] FDC DMA Mode
= 0
= 1
Bit[3:2] Interface Mode
= 11 AT Mode (default)
= 10 (Reserved)
= 01 PS/2
= 00 Model 30
Bit[4] Swap Drives 0,1 Mode
= 0
= 1
Bit[5] Reserved, set to zero
Bit[6] FDC Output Type Control
= 0
= 1
Bit[7] FDC Output Control
= 0
= 1
Note: Bits 6 & 7 do not affect the parallel port FDC pins.
Bits[1:0] Reserved, set to zero
Bits[3:2] Density Select
= 00 Normal (default)
= 01 Normal (reserved for users)
= 10 1 (forced to logic "1")
= 11 0 (forced to logic "0")
Bit[4] Media ID 0 Polarity
= 0:
= 1:
Bit[5] Media ID 1 Polarity
= 0:
= 1:
Bits[7:6] Boot Floppy
= 00 FDD 0 (default)
= 01 FDD 1
= 10 Reserved (neither drive A or B is a boot drive).
= 11 Reserved (neither drive A or B is a boot drive).
Bits[1:0] Floppy Drive A Type
Bits[3:2] Floppy Drive B Type
Bits[5:4] Reserved (could be used to store Floppy Drive C
type)
Bits[7:6] Reserved (could be used to store Floppy Drive D
type)
Note: The FDC37C672 supports two floppy drives
Reserved, Read as 0 (read only)
DATASHEET
Normal Floppy Mode (default)
Enhanced Floppy Mode 2 (OS2)
Burst Mode is enabled
Non-Burst Mode (default)
No swap (default)
Drive and Motor sel 0 and 1 are swapped.
FDC outputs are OD24 open drain (default)
FDC outputs are O24 push-pull
FDC outputs active (default)
FDC outputs tri-stated
Don’t invert (default)
Invert
Don’t invert (default)
Invert
Page 133
DEFINITION
Rev. 10-29-03
STATE
C
C
C
C