CS5530A datasheet(192/259 Pages) AMD

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192

AMD Geode™ CS5530A Companion Device Data Book

Revision 1.1

Sound Card or FM Trap SMI Status (Read to Clear): SMI was caused by a trapped I/O access to the sound card or FM I/

O Trap? 0 = No; 1 = Yes. (Note)

Fast Path Write must be disabled, F3BAR+Memory Offset 18h[11] = 0, for the SMI to be reported here. If Fast Path Write is

enabled, the SMI is reported in bit 13 of this register.

This is the third level of SMI status reporting.

The second level of SMI status is reported at F3BAR+Memory Offset 10h/12h[0].

The top level is reported at F1BAR+Memory Offset 00h/02h[1].

SMI generation enabling is at F3BAR+Memory Offset 18h[2].

9:0

X-Bus Address (Read Only): Bits [9:0] contain the captured ten bits of X-Bus address.

Note: For the four SMI status bits (bits [13:10]), if the activity was a fast write to an even address, no SMI is generated regardless of the

DMA, MPU, or sound card status. If the activity was a fast write to an odd address, an SMI is generated but bit 13 is set to a 1.

Offset 18h-19h

I/O Trap SMI Enable Register (R/W)

Reset Value = 0000h

15:12

Reserved: Set to 0.

Fast Path Write Enable: Fast Path Write (an SMI is not generated on certain writes to specified addresses).

0 = Disable; 1 = Enable.

In Fast Path Write, the CS5530A responds to writes to the following addresses: 388h, 38Ah and 38Bh; 2x0h, 2x2h, and

2x8h.

10:9

Fast Read: These two bits hold part of the response that the CS5530A returns for reads to several I/O locations.

High DMA I/O Trap: 0 = Disable; 1 = Enable.

If this bit is enabled and an access occurs at I/O Port C0h-DFh, an SMI is generated.

Top level SMI status is reported at F1BAR+Memory Offset 00h/02h[1].

Second level SMI status is reported at F3BAR+Memory Offset 10h/12h[0].

Third level SMI status is reported at F3BAR+Memory Offset 14h[12].

Low DMA I/O Trap: 0 = Disable; 1 = Enable.

If this bit is enabled and an access occurs at I/O Port 00h-0Fh, an SMI is generated.

Top level SMI status is reported at F1BAR+Memory Offset 00h/02h[1].

Second level SMI status is reported at F3BAR+Memory Offset 10h/12h[0].

Third level SMI status is reported at F3BAR+Memory Offset 14h[12].

High MPU I/O Trap: 0 = Disable; 1 = Enable.

If this bit is enabled and an access occurs at I/O Port 330h and 331h, an SMI is generated.

Top level SMI status is reported at F1BAR+Memory Offset 00h/02h[1].

Second level SMI status is reported at F3BAR+Memory Offset 10h/12h[0].

Third level SMI status is reported at F3BAR+Memory Offset 14h[11].

Low MPU I/O Trap: I0 = Disable; 1 = Enable.

If this bit is enabled and an access occurs at I/O Port 300h and 301h, an SMI is generated.

Top level SMI status is reported at F1BAR+Memory Offset 00h/02h[1].

Second level SMI status is reported at F3BAR+Memory Offset 10h/12h[0].

Third level SMI status is reported at F3BAR+Memory Offset 14h[11].

Fast Path Read Enable/SMI Disable: Read Fast Path (an SMI is not generated on reads from specified addresses).

0 = Disable; 1 = Enable.

In Fast Path Read the CS5530A responds to reads of the following addresses: 388h-38Bh; 2x0h, 2x1h, 2x2h, 2x3h, 2x8h

and 2x9h.

Note that if neither sound card nor FM I/O mapping is enabled, then status read trapping is not possible.

FM I/O Trap: 0 = Disable; 1 = Enable.

If this bit is enabled and an access occurs at I/O Port 388h to 38Bh, an SMI is generated.

Top level SMI status is reported at F1BAR+Memory Offset 00h/02h[1].

Second level SMI status is reported at F3BAR+Memory Offset 10h/12h[0].

Sound Card I/O Trap: 0 = Disable; 1 = Enable

If this bit is enabled and an access occurs in the address ranges selected by bits [1:0], an SMI is generated.

Top level SMI status is reported at F1BAR+Memory Offset 00h/02h[1].

Second level SMI status is reported at F3BAR+Memory Offset 10h/12h[0].

Third level SMI status is reported at F3BAR+Memory Offset 14h[10].

1:0

Sound Card Address Range Select: These bits select the address range for the sound card I/O trap.

00 = I/O Port 220h-22Fh

10 = I/O Port 260h-26Fh

01 = I/O Port 240h-24Fh

11 = I/O Port 280h-28Fh

Table 5-21. F3BAR+Memory Offset xxh: XpressAUDIO™ Subsystem Configuration Registers (Contin-

Bit

Description

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