FDC37M607 datasheet(138/182 Pages) SMSC

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Table 59 - Floppy Disk Controller, Logical Device 0 [Logical Device Number = 0x00]

NAME

REG INDEX

DEFINITION

STATE

FDD Option

Default = 0x00

on Vcc POR or

Reset_Drv

0xF1 R/W

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: Don’t invert (default)

= 1: Invert

Bit[5] Media ID 1 Polarity

= 0: Don’t invert (default)

= 1: Invert

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).

FDD Type Register

Default = 0xFF

on Vcc POR or

Reset_Drv

0xF2 R/W

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 FDC37M60x supports two floppy drives

0xF3 R

Reserved, Read as 0 (read only)

FDD0

Default = 0x00

on Vcc POR or

Reset_Drv

0xF4 R/W

Bits[1:0] Drive Type Select: DT1, DT0

Bits[2]

Read as 0 (read only)

Bits[4:3] Data Rate Table Select: DRT1, DRT0

Bits[5]

Read as 0 (read only)

Bits[6]

Precompensation Disable PTS

=0 Use Precompensation

=1 No Precompensation

Bits[7]

Read as 0 (read only)

FDD1

0xF5 R/W

Refer to definition and default for 0xF4

FDC37M607 Datasheet(PDF) 138 Page - SMSC Corporation

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