CS5535 datasheet(66/555 Pages) NSC

Il numero della parte	CS5535

Spiegazioni elettronici	Geode??CS5535 I/O Companion Multi-Function South Bridge

PDF	555 Pages

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Produttore elettronici	NSC [National Semiconductor (TI)]

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Revision 0.8

Global Concepts and Features (Continued)

487h

DMA Channel 0 High Page

8-bit

Rec

Upper addr bits [31:24]. Write LPC

and DMA. Read only DMA.

488h

No Specific Usage

8-bit

Write LPC and DMA. Read only

DMA.

489h

DMA Channel 6 High Page

8-bit

Rec

Upper addr bits [31:24]. Write LPC

and DMA. Read only DMA.

48Ah

DMA Channel 7 High Page

48Bh

DMA Channel 5 High Page

48Ch-48Eh

No Specific Usage

8-bit

Write LPC and DMA. Read only

DMA.

48Fh

DMA Channel 4 High Page

8-bit

Rec

Upper addr bits [31:24]. Write LPC

and DMA. Read only DMA.

490h-4CFh

No Specific Usage

---

4D0h

PIC Level/Edge

8-bit

Yes

IRQ0-IRQ 7.

4D1h

PIC Level/Edge

8-bit

Yes

IRQ8-IRQ15.

4D2h-4FFh

No Specific Usage

---

Note 1. The Diverse Device snoops writes to this port and maintains the MSB as NMI enable. When low, NMI is enabled.

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.

Table 3-6. Legacy I/O: 000h-4FFh (Continued)

I/O Addr.

Function

Size

R/W

Comment

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