cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 66

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

www.national.com
Global Concepts and Features
Note 1. The Diverse Device snoops writes to this port and maintains the MSB as NMI enable. When low, NMI is enabled.
I/O Addr.
487h
488h
489h
48Ah
48Bh
48Ch-48Eh No Specific Usage
48Fh
490h-4CFh No Specific Usage
4D0h
4D1h
4D2h-4FFh No Specific Usage
When high, NMI is disabled. This bit defaults high. Reads of this port return bits [6:0] from the on-chip or off-chip
target, while bit 7 is returned from the “maintained” value.
Function
DMA Channel 0 High Page
No Specific Usage
DMA Channel 6 High Page
DMA Channel 7 High Page
DMA Channel 5 High Page
DMA Channel 4 High Page
PIC Level/Edge
PIC Level/Edge
Table 3-6. Legacy I/O: 000h-4FFh (Continued)
(Continued)
66
Size
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
8-bit
---
---
R/W
Rec
WO
Rec
WO
Rec
Yes
Yes
---
---
Comment
Upper addr bits [31:24]. Write LPC
and DMA. Read only DMA.
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.
Upper addr bits [31:24]. Write LPC
and DMA. Read only DMA.
IRQ0-IRQ 7.
IRQ8-IRQ15.
Revision 0.8