Pin Descriptions

PIN

TYPE

DESCRIPTION

SD15 - SD0

I/O

Data bus

SA1 - SA0

I

Address

CS

I

Chip select (active low)

IOW

I

Write strobe (active low)

IOR

I

Read strobe (active low)

SBHE

I

System High Byte Enable (active low)

IOCS16

OC

Indicates that the access register can support 16 bit transfer.

DRQP

O

DMA Request (play channel)

DRQR

O

DMA Request (record channel)

DACKP

I

DMA Acknowledge (play channel)

DACKR

I

DMA Acknowledge (record channel)

TC

I

DMA terminal count

IRQ

O

Interrupt request (active high, open drain)

RESET

I

Reset (active high)

XTLI

I

Crystal oscillator

XTLO

O

Crystal oscillator

PWRDN

I

Power-down (active low)

AUDIOIN

AI

Audio buffer input

ADCIN

AO

Audio buffer output/input to ADC

DACOUT

AO

DAC audio output

BUFIN

AI

Uncommitted audio buffer input

BUFOUT

AO

Uncommitted audio buffer output

VDD

P

Digital +5V supply

VDDA

P

Analog +5V supply

VDDP

P

Digital +5V supply

VSS

P

Digital GND

VSSA

P

Analog GND

VSSP

P

Digital GND

ICS2002

2