CMI-8738/PCI-SX Ver la hoja de datos (PDF) - C-Media Electronics

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CMI-8738/PCI-SX

C3DX PCI-Based HRTF 3D Extension Positional Audio Chip

C-Media Electronics 

Ver. 1.2

CMI-8738/PCI-SX AUDIO Specification

18-17

16

15

14

13

12

11-5

4

3-2

1-0

* Notice

Reserved

VIDWPDSB Sub ID write protect disabled. (default 0)

Reserved

MASK_EN Activate channel mask on Legacy DMA.

0

Disabled

1

Enabled

VIDWPDSB Write Protect of HSP Configuration Sub ID.

0

Protect.

1

No protect.

SFILENB

Let software contrl filter stepping at the front end DAC.

Reserved

MIDSMP

Enable 1/2 interpolation at the Front end DAC..

UPDDMA[1:0] For every the number of samples to notify updating TDMA position.

00 Every 2048 samples

01 Every 1024 samples

10 Every 512 samples.

11 Every 256 samples.

TWAIT[1:0] For controling the length of legacy BUS cycle.

00

3 PCICLK.

01

18 PCICLK.

10

24 PCICLK

11

32 PCICLK

REQ_SQ[2:0]

States of BusRequest Engine.

MM_DATA

Bus Master is using Bus.

MIDLE

Bus Master is not using Bus.

REQA/REQB

Channel 0/1 BusMaster Request.

GNTA/GNTB

Channel 0/1 BusMaster Grant.

ADRQ/BDRQ

Channel 0/1 DMA Request.

ADACK/BDACK

Channel 0/1 DMA Acknoledge.

AIRQ/BIRQ

Channel 0/1 Interrupt.

CX/BX

Channel 0/1 Busy.

T - DMA Position

Bit(s)

31-16

R/W

R

Name

TDMACN T

Address 1CH

Description

Current Byte/Word Count of DMA channel.

15-0

R

TDMAADR Current Address of DMA channel.

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