CS5535 datasheet(255/555 Pages) NSC

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ATAC Register Descriptions (Continued)

5.4.2.3

Channel 0 Drive 0 PIO (ATAC_CH0D0_PIO)

Note:

The reset value of this register is not a valid PIO mode.

ATAC_RESET Bit Descriptions

Bit

Name

Description

63:2

RSVD

Reserved. Set to 0. Return 0 on read.

ATAC_RESET

IDE Controller Reset. Reset the IDE Controller.

0: Normal state (operate).

1: Reset.

Write 0 to clear. This bit is level-sensitive and must be cleared after reset is performed.

IDE_RESET

IDE Reset. Reset the IDE bus.

0: Normal state (operate).

1: Reset.

Write 0 to clear. This bit is level-sensitive and must be cleared after reset is performed.

MSR Address

51300020h

Type

R/W

Reset Value

00000000_00009172h

ATAC_CH0D0_PIO Register Map

63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32

RSVD

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10

RSVD

PIOMODE

t2I

t2W

t2IC

t3C

t2WC

t1C

t2ID

t3D

t2WD

t1D

ATAC_CH0D0_PIO Bit Descriptions

Bit

Name

Description

63:32

RSVD

Reserved. Set to 0.

If MSR 50302021h[31] = 0, Format 0. Selects slowest PIOMODE per channel (by comparing bit [19:16] of MSR

50302020h and MSR 50302022h) for commands.

Format 0 settings for:

PIO Mode 0 = 0000F7F4h

PIO Mode 1 = 000153F3h

PIO Mode 2 = 000213F1h

PIO Mode 3 = 00035131h

PIO Mode 4 = 00041131h

31:20

RSVD

Reserved. Set to 0.

19:16

PIOMODE

PIO Mode.

0000: PIO Mode 0

0011: PIO Mode 3

0001: PIO Mode 1

0100: PIO Mode 4

0010: PIO Mode 2

All Other Values are Reserved

15:12

t2I

Recovery Time. Value + 1 cycle.

11:8

IDE_IOW# Data Setup Time. Value + 1 cycle.

7:4

t2W

IDE_IOW# Width Minus t3. Value + 1 cycle.

3:0

Address Setup Time. Value + 1 cycle.

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