F81865F View Datasheet(PDF) - Feature Integration Technology Inc.

Part Name

Description

Manufacturer

F81865F

Super IO with 6 UARTs

Feature Integration Technology Inc. 

F81865

5

STEP

R

0 This bit indicates the complement of STEP# disk interface output.

4

TRK0_N

R

- This bit indicates the state of TRK0# disk interface input.

This bit indicates the complement of HDSEL# disk interface output.

3

HDSEL

R

0 0: side 0.

1: side 1.

2

INDEX_N

R

- This bit indicates the state of INDEX# disk interface input.

This bit indicates the state of WPT# disk interface input.

1

WPT_N

R

- 0: disk is write-protected.

1: disk is not write-protected.

0

DIR

R

0 This bit indicates the complement of DIR# disk interface output.

Status Register A (Model 30 mode) ⎯ Base + 0

Bit

Name

R/W Default

Description

7

INTPEND

R

0 This bit indicates the state of the interrupt output.

6

DRQ

R

0 This bit indicates the state of the DRQ signal.

5

STEP_FF

R

0 This bit indicates the complement of latched STEP# disk interface output.

4

TRK0

R

- This bit indicates the complement of TRK0# disk interface input.

This bit indicates the state of HDSEL# disk interface output.

3

HDSEL_N

R

1 0: side 0.

1: side 1.

2

INDEX

R

- This bit indicates the complement of INDEX# disk interface input.

This bit indicates the complement of WPT# disk interface input.

1

WPT

R

- 0: disk is write-protected.

1: disk is not write-protected.

This bit indicates the state of DIR# disk interface output.

0

DIR_N

R

1 0: head moves in inward direction.

1: head moves in outward direction.

Status Register B (PS/2 Mode) ⎯ Base + 1

Bit

Name

R/W Default

Description

7-6

Reserved

R

11 Reserved. Return 11b when read.

5

DR0

R

0 Drive select 0. This bit reflects the bit0 of Digital Output Register.

4

WDATA

R

0 This bit changes state at every rising edge of WDATA#.

3

RDATA

R

0 This bit changes state at every rising edge of RDATA#.

2

WGATE

R

0 This bit indicates the complement of WGATE# disk interface output.

1

MOTEN1

R

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

in this design.

0

MOTEN0

R

0 This bit indicates the complement of MOA# disk interface output.

Status Register B (Model 30 Mode) ⎯ Base + 1

Bit

Name

R/W Default

Description

0: a second drive has been installed.

7

DRV2_N

R

-

1: a second drive has not been installed.

21

May, 2010

V0.28P

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