F81865F データシートの表示（PDF） - Feature Integration Technology Inc.

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F81865F

Super IO with 6 UARTs

Feature Integration Technology Inc. 

F81865

6

DSB_N

R

1

This bit indicates the state of DRVB# disk interface output. Not support in this

design.

5

DSA_N

R

1 This bit indicates the state of DRVA# disk interface output.

This bit is latched at the rising edge of WDATA# and is cleared by a read from

4

WDATA_FF

R

0 the Digital Input Register.

3

RDATA_FF

R

0 This bit is latched at the rising edge of RDATA# and is cleared by a read form

the Digital Input Register.

2

WGATE_FF

R

0

This bit is latched at the falling edge of WGATE# and is cleared by a read from

the Digital Input Register.

This bit indicates the complement of DRVD# disk interface output. Not support

1

DSD_N

R

1 in this design.

0

DSC_N

R

1 This bit indicates the complement of DRVC# disk interface output. Not support

in this design.

Digital Output Register ⎯ Base + 2

Bit

Name

R/W Default

Description

7

MOTEN3

R

0 Motor enable 3. Not support in this design.

6

MOTEN2

R

0 Motor enable 2. Not support in this design.

5

MOTEN1

R/W 0 Motor enable 1. Used to control MOB#. MOB# is not support in this design.

4

MOTEN0

R/W 0 Motor enable 0. Used to control MOA#.

DMA enable. This bit has two mode of operation.

PC-AT and Model 30 mode: write 1 will enable DMA and IRQ, write 0 will

3

DAMEN

R/W 0 disable DMA and IRQ.

PS/2 mode: This bit is reserved. DMA and IRQ are always enabled in PS/2

mode.

2

RESET

R

0

Write 0 to this bit will reset the controller. I will remain in reset condition until a 1

is written.

This bit indicates the complement of DRVD# disk interface output. Not support

1

DSD_N

R

1 in this design.

0

DSC_N

R

1 This bit indicates the complement of DRVC# disk interface output. Not support

in this design.

Tape Drive Register ⎯ Base + 3

Bit

Name

R/W Default

Description

7-6

Reserved

R 00 Reserved. Return 00b when read.

5-4

TYPEID

Reserved in normal function, return 11b when read.

R

11

If 3 mode FDD function is enabled. These bits indicate the drive type ID.

3-2

Reserved

Reserved. Return 11b when read in normal function.

R

11

Return 00b when read in 3 mode FDD function.

1-0

TAPESEL

R/W 0 These bits assign a logical drive number to be a tape drive.

Main Status Register ⎯ Base + 4

Bit

Name

R/W Default

Description

7

RQM

R

0 Request for Master indicates that the controller is ready to send or receive data

from the uP through the FIFO.

22

May, 2010

V0.28P

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