SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 263

• Manufacturer Part Number: SC2200
• Description: Thin Client On a Chip
• Manufacturer: NSC [National Semiconductor]

Revision 3.0
Core Logic Module
Index 40h-43h
If Index 44h[31] = 0, Format 0. The bits in this register select the slowest PIO mode per channel for commands.
Format 0 settings for a Fast-PCI clock frequency of 33.3 MHz:
Format 0 settings for a Fast-PCI clock frequency of 48 MHz:
Format 0 settings for a Fast-PCI clock frequency of 66.7 MHz:
Note:
If Index 44h[31] = 1, Format 1. The bits in this register allow independent control of command and data.
Format 1 settings for a Fast-PCI clock frequency of 33.3 MHz:
Format 1 settings for a Fast-PCI clock frequency of 48 MHz:
Format 1 settings for a Fast-PCI clock frequency of 66.7 MHz:
Note:
Table 5-35. F2: PCI Header/Channels 0 and 1 Registers for IDE Controller Configuration (Continued)
31:20
19:16
15:12
31:28
27:24
23:20
19:16
15:12
11:8
11:8
— PIO Mode 0 = 00009172h
— PIO Mode 1 = 00012171h
— PIO Mode 2 = 00020080h
— PIO Mode 3 = 00032010h
— PIO Mode 4 = 00040010h
— PIO Mode 0 = 0000FAA3h
— PIO Mode 1 = 0001C232h
— PIO Mode 2 = 00025131h
— PIO Mode 3 = 00033121h
— PIO Mode 4 = 00041021h
— PIO Mode 0 = 0000FFF4h
— PIO Mode 1 = 0001F353h
— PIO Mode 2 = 00028141h
— PIO Mode 3 = 00034231h
— PIO Mode 4 = 00041131h
— PIO Mode 0 = 9172D132h
— PIO Mode 1 = 21717121h
— PIO Mode 2 = 00803020h
— PIO Mode 3 = 20102010h
— PIO Mode 4 = 00100010h
— PIO Mode 0 = E2A3F383h
— PIO Mode 1 = 42A2B232h
— PIO Mode 2 = 11B16121h
— PIO Mode 3 = 31213121h
— PIO Mode 4 = 10211021h
— PIO Mode 0 = F8E4F8E4h
— PIO Mode 1 = 53F3F353h
— PIO Mode 2 = 13F18141h
— PIO Mode 3 = 42314231h
— PIO Mode 4 = 11311131h
7:4
3:0
7:4
3:0
Bit
All references to "cycle" in the following bit descriptions are to a Fast-PCI clock cycle.
All references to "cycle" in the following bit descriptions are to a Fast-PCI clock cycle.
Description
Reserved. Must be set to 0.
PIOMODE. PIO mode.
t2I. Recovery time (value + 1 cycle).
t3. IDE_IOW# data setup time (value + 1 cycle).
t2W. IDE_IOW# width minus t3 (value + 1 cycle).
t1. Address Setup Time (value + 1 cycle).
t2IC. Command cycle recovery time (value + 1 cycle).
t3C. Command cycle IDE_IOW# data setup (value + 1 cycle).
t2WC. Command cycle IDE_IOW# pulse width minus t3 (value + 1 cycle).
t1C. Command cycle address setup time (value + 1 cycle).
t2ID. Data cycle recovery time (value + 1 cycle).
t3D. Data cycle IDE_IOW# data setup (value + 1 cycle).
t2WD. Data cycle IDE_IOW# pulse width minus t3 (value + 1 cycle).
t1D. Data cycle address Setup Time (value + 1 cycle).
(Continued)
Channel 0 Drive 0 PIO Register (R/W)
263
Reset Value: 00009172h
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