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CS5535-UDC Datasheet(PDF) 63 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # CS5535-UDC
Description  Geode??CS5535 I/O Companion Multi-Function South Bridge
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

CS5535-UDC Datasheet(HTML) 63 Page - National Semiconductor (TI)

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Revision 0.8
63
www.national.com
Global Concepts and Features (Continued)
00Eh
Slave DMA Reset Mask - Channels [3:0]
8-bit
Shw@
Reads return value B2h.
00Fh
Slave DMA General Mask - Channels [3:0]
8-bit
Shw@
Reads return value B2h.
010h-01Fh
No Specific Usage
---
---
020h
PIC Master - Command/Status
8-bit
Shw$
021h
PIC Master - Command/Status
8-bit
Shw$
022h-03Fh
No Specific Usage
---
---
040h
PIT – System Timer
8-bit
Shw$
041h
PIT – Refresh Timer
8-bit
Shw$
042h
PIT – Speaker Timer
8-bit
Shw$
043h
PIT – Control
8-bit
Shw$
044h-05Fh
No Specific Usage
---
---
060h
Keyboard/Mouse - Data Port
8-bit
Yes
If KEL Memory Offset 100h[0] = 1
(EmulationEnable bit).
If MSR
5140001Fh[0] = 1 (SNOOP
bit) and KEL Memory Offset 100h[0]
= 0 (EmulationEnable bit).
061h
Port B Control
8-bit
Yes
062h-063h
No Specific Usage
---
---
064h
Keyboard/Mouse - Command/ Status
8-bit
Yes
If KEL Memory Offset 100h[0] = 1
(EmulationEnable bit).
If MSR
5140001Fh[0] = 1 (SNOOP
bit) and KEL Memory Offset 100h[0]
= 0 (EmulationEnable bit).
065h-06Fh
No Specific Usage
---
---
070h-071h
RTC RAM Address/Data Port
8-bit
Yes
Options per MSR 51400014h[0].
(Note 1)
072h-073h
High RTC RAM Address/Data Port
8-bit
Yes
Options per MSR 51400014h[1].
074h-077h
No Specific Usage
---
---
078h-07Fh
No Specific Usage
---
---
080h
Post Code Display
8-bit
Rec
Write LPC and DMA. Read only
DMA.
081h
DMA Channel 2 Low Page
8-bit
Rec
Upper addr bits [23:16]. Write LPC
and DMA. Read only DMA.
082h
DMA Channel 3 Low Page
083h
DMA Channel 1 Low Page
084h-086h
No Specific Usage
8-bit
Rec
Write LPC and DMA. Read only
DMA.
087h
DMA Channel 0 Low Page
8-bit
Rec
Upper addr bits [23:16]. Write LPC
and DMA. Read only DMA.
088h
No Specific Usage
8-bit
Rec
Write LPC and DMA. Read only
DMA.
089h
DMA Channel 6 Low Page
8-bit
Rec
Upper addr bits [23:16]. Write LPC
and DMA. Read only DMA.
08Ah
DMA Channel 7 Low Page
08B
DMA Channel 5 Low Page
Table 3-6. Legacy I/O: 000h-4FFh (Continued)
I/O Addr.
Function
Size
R/W
Comment


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