F81865 datasheet(21/128 Pages) FINTEK

21 / 128 page

F81865

May, 2010

V0.28P

STEP

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

TRK0_N

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

HDSEL

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

0: side 0.

1: side 1.

INDEX_N

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

WPT_N

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

0: disk is write-protected.

1: disk is not write-protected.

DIR

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

Status Register A (Model 30 mode)

⎯ Base + 0

Bit

Name

R/W Default

Description

INTPEND

This bit indicates the state of the interrupt output.

DRQ

This bit indicates the state of the DRQ signal.

STEP_FF

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

TRK0

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

HDSEL_N

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

0: side 0.

1: side 1.

INDEX

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

WPT

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

0: disk is write-protected.

1: disk is not write-protected.

DIR_N

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

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

Reserved. Return 11b when read.

DR0

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

WDATA

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

RDATA

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

WGATE

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

MOTEN1

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

in this design.

MOTEN0

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

Status Register B (Model 30 Mode)

⎯ Base + 1

Bit

Name

R/W Default

Description

DRV2_N

0: a second drive has been installed.

1: a second drive has not been installed.

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