cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 65
![no-image](/images/no-image-200.jpg)
cs5535
Manufacturer Part Number
cs5535
Description
Geode Cs5535 Companion Multi-function South Bridge
Manufacturer
National Semiconductor Corporation
Datasheet
1.CS5535.pdf
(555 pages)
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Revision 0.8
Global Concepts and Features
I/O Addr.
0E0h-2E7h No Specific Usage
2E8h-2EFh UART/IR - COM4
2F0h-2F7h
2F8h-2FFh
300h-36Fh
370h
371h
372h
373h
374h
375h
376h
377h
378h-3E7h
3E8h-3EFh UART/IR - COM3
3F0h
3F1h
3F2h
3F3h
3F4h
3F5h
3F6h
3F7h
3F8h-3FFh
400h-47Fh
480h
481h
482h
483h
484h-486h
Function
No Specific Usage
UART/IR - COM2
No Specific Usage
Floppy Status R A
Floppy Status R B
Floppy Digital Out
No Specific Usage
Floppy Cntrl Status
Floppy Data
No Specific Usage
Floppy Conf Reg
No Specific Usage
Floppy Status R A
Floppy Status R B
Floppy Digital Out
No Specific Usage
Floppy Cntrl Status
Floppy Data
No Specific Usage
Floppy Conf Reg
UART/IR - COM1
No Specific Usage
No Specific Usage
DMA Channel 2 High Page
DMA Channel 3 High Page
DMA Channel 1 High Page
No Specific Usage
Table 3-6. Legacy I/O: 000h-4FFh (Continued)
(Continued)
65
Size
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
---
---
---
---
---
Shw@
Shw@
Shw$
Shw$
R/W
WO
Rec
WO
Yes
Yes
RO
RO
RO
RO
RO
RO
---
---
---
---
---
---
---
---
---
---
---
---
---
Comment
MSR bit enables/disables into I/O
space.(UART1 MSR
51400014h[18:16], UART2 MSR
51400014h[22:20]). Defaults to LPC.
MSR bit enables/disables into I/O
space.(UART1 MSR
51400014h[18:16], UART2 MSR
51400014h[22:20]). Defaults to LPC.
Second Floppy.
Second Floppy.
Second Floppy.
Second Floppy.
Second Floppy.
Second Floppy.
MSR bit enables/disables into I/O
space.(UART1 MSR
51400014h[18:16], UART2 MSR
51400014h[22:20]). Defaults to LPC.
First Floppy.
First Floppy.
First Floppy.
First Floppy.
First Floppy.
First Floppy.
MSR bit enables/disables into I/O
space.(UART1 MSR
51400014h[18:16], UART2 MSR
51400014h[22:20]). Defaults to LPC.
Write LPC and DMA. Read only
DMA.
Upper addr bits [31:24]. Write LPC
and DMA. Read only DMA.
Write LPC and DMA. Read only
DMA.
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