CS4239 datasheet(13/98 Pages) CIRRUS

13 / 98 page

GENERAL DESCRIPTION

This device is comprised of six physical devices

along with Plug-and-Play support for one addi-

tional external device. The internal devices are:

Windows Sound System Codec

Sound Blaster Pro Compatible Interface

Game Port (Joystick)

Control

MPU-401

FM Synthesizer

The external device is:

IDE CDROM

On power up, this part requires a RESDRV sig-

nal to initialize the internal configuration. When

initially powered up, the part is isolated from the

bus, and each device supported by the part must

be activated via software. Once activated, each

device responds to the resources given (Address,

IRQ, and DMA channels). The devices listed

above are grouped into five logical devices, as

shown in Figure 1 (bracketed features are sup-

ported, but typically not used). The five logical

devices are:

LOGICAL DEVICE 0:

Windows Sound System Codec (WSS Codec)

Adlib/Sound Blaster-compatible Synthesizer

Sound Blaster Pro Compatible Interface

LOGICAL DEVICE 1: Game Port

LOGICAL DEVICE 2: Control

LOGICAL DEVICE 3: MPU401

LOGICAL DEVICE 4: CDROM

Logical Device 0 consists of three physical de-

vices. The WSS Codec and the Synthesizer are

grouped together since the original Windows

Sound System card expected an FM synthesizer

if the codec was present. The Sound Blaster Pro

Compatible interface, SBPro, is also grouped to

allow the WSS Codec and the SBPro to share

Interrupts and DMA channels. The WSS Codec,

FM synthesizer, and the SBPro compatible de-

vices are internal to the part.

Logical Device 1 is the Game Port that supports

up to two joystick devices.

Logical Device 2 is the Control device that sup-

ports global features of the part. This device uses

I/O locations to control power management,

joystick rate, and PnP resource data loading.

Logical Device 3 is the MPU-401 interface. The

MPU-401 MIDI interface includes a 16-byte

FIFO for data transmitted out the MIDOUT pin

and a 16-byte FIFO for data received from the

MIDIN pin.

Logical Device 4 supports an IDE CDROM de-

vice. Although this logical device is listed as a

CDROM, any external device that fits within the

resources listed above may be substituted. This

interface, is generic and can support devices us-

ing 1 to 127 I/O locations for the base address, 1

to 8 I/O locations for the alternate base address,

an interrupt, and a DMA channel.

ISA Bus Interface

The 8-bit parallel I/O and 8-bit parallel DMA

ports provide an interface which is compatible

with the Industry Standard Architecture (ISA)

bus. The ISA Interface enables the host to com-

municate with the various functional blocks

within the part via two types of accesses: Pro-

grammed I/O (PIO) access, and DMA access.

A number of configuration registers must be pro-

grammed prior to any accesses by the host

computer. The configuration registers are pro-

grammed via a Plug-and-Play configuration

sequence or via configuration software provided

by Cirrus Logic.

DS253PP2

CS4239

CrystalClear Portable ISA Audio System

CS4239 датащи(PDF) 13 Page - Cirrus Logic

CS4239 датащи(HTML) 13 Page - Cirrus Logic

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98

датащи скачать

ссылки URL