CS4611 datasheet(18/29 Pages) CIRRUS

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DS241PP5

CS4610/11

CrystalClear™ SoundFusion™ PCI Audio Accelerator

slots (output slots 3 - 12). The CS4610/11 ASDIN

input supports receiving of audio sample data on 6

input sample slots (input slots 3 - 8). The SDO2,

SDO3 serial outputs and the SDIN2 serial input are

not supported in this configuration.

MIDI Port

the

AC’97

controller

configuration,

the

CS4610/11 provides a bi-directional MIDI inter-

face to allow connection of external MIDI devices.

The CS4610/11 MIDI interface includes 16-byte

FIFOs for the MIDI transmit and receive paths.

Joystick Port

the

AC’97

controller

configuration,

the

CS4610/11

provides

joystick

port.

The

CS4610/11 joystick port provides four “coordi-

nate” channels and four “button” channels of input

capability. The coordinate channels provide joy-

stick positional information to the host, and the but-

ton

channels

provide

user

button

event

information. The joystick interface is capable of

operating in the traditional “polled” mode, but also

provides a “hardware accelerated” mode of opera-

tion wherein internal counters assist the host with

coordinate position determination. The joystick

schematic is illustrated in Figure 14.

EEPROM Configuration Interface

The CS4610/11 EEPROM configuration interface

allows the connection of an optional external EE-

PROM device to provide power-up configuration

information. The external EEPROM is not required

for proper operation of the CS4610. However, in

some applications power-up configuration settings

other than the CS4610/11 device default values

may be required to support specific operating sys-

tem compatibility requirements (the CS4610/11

default is the CS4610/11 + CS423x configuration).

These default values can be programmed through

BIOS code or by using the external EEPROM.

After a hardware reset, an internal state machine in

the CS4610/11 will automatically detect the pres-

FS YNC

SC LK

SD O UT

SD IN

LRCL K

SD O3

SD O2

ADC 16 Clocks

DAC 16 Clocks

ADC 16 Clocks

DAC 16 Clocks

Left Data

Right Data

DAC 16 Clocks

... 0

15 14 13

...

Figure 12. Serial Audio Port Format for CS4610 + CS423x Expanded Output Configuration.

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