cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 255

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

Revision 0.8
ATAC Register Descriptions
5.4.2.3
MSR Address
Type
Reset Value
Note: The reset value of this register is not a valid PIO mode.
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
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
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:
63:32
31:20
19:16
15:12
63:2
11:8
Bit
Bit
7:4
3:0
1
0
t2IC
Channel 0 Drive 0 PIO (ATAC_CH0D0_PIO)
Name
RSVD
ATAC_RESET
IDE_RESET
Name
RSVD
RSVD
PIOMODE
t2I
t3
t2W
t1
51300020h
R/W
00000000_00009172h
RSVD
t3C
PIO Mode 0 = 0000F7F4h
PIO Mode 1 = 000153F3h
PIO Mode 2 = 000213F1h
PIO Mode 3 = 00035131h
PIO Mode 4 = 00041131h
Description
Reserved. Set to 0. Return 0 on read.
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. 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.
Description
Reserved. Set to 0.
Reserved. Set to 0.
PIO Mode.
0000: PIO Mode 0
0001: PIO Mode 1
0010: PIO Mode 2
Recovery Time. Value + 1 cycle.
IDE_IOW# Data Setup Time. Value + 1 cycle.
IDE_IOW# Width Minus t3. Value + 1 cycle.
Address Setup Time. Value + 1 cycle.
t2WC
ATAC_CH0D0_PIO Bit Descriptions
(Continued)
ATAC_CH0D0_PIO Register Map
ATAC_RESET Bit Descriptions
PIOMODE
t1C
RSVD
255
t2ID
t2I
0011: PIO Mode 3
0100: PIO Mode 4
All Other Values are Reserved
t3D
t3
9
8
7
6
t2WD
t2W
5
4
3
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2
t1D
t1
1
0