WTS701EMSLASHT datasheet(9/77 Pages) WINBOND

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WTS701

Publication Release Date: May 2003

- 9 -

Revision 3.09

6. PIN DESCRIPTION

Table 1. WTS701 Pin Signal Assignment.

PIN NO.

SYMBOL

I/O

FUNCTION

2,36,44

VSSA

Analog Ground pins.

VCLK

CODEC master clock

VFS

CODEC frame synchronization signal

VDX

CODEC data output. This pin puts data out in the linear PCM

unsigned or 2’s complement format. It is tri-stated until the user

requests a CONVERT operation.

MISO

SPI Master In, Slave Out pin. Serial data line used to

communicate with SPI master. Pin is tri-state when SS =1.

XTAL2

CRYSTAL 2: This is the crystal oscillator output. It is the

inversion of XTAL1.

XTAL1

CRYSTAL 1: This is the crystal oscillator input. This pin may be

driven by an external clock. The clock to the WTS701 processor

is configured by a clock configuration register, which is set by the

host processor during the initialization phase.

9,10

VSSD

Digital Ground pin.

11,12

VCCD

Positive Digital Voltage Supply pin. These pins carry noise

generated by internal clocks in the chip. They must be

independently bypassed to Digital Ground to ensure correct

device operation and not connected together.

INT

Interrupt Output; an open drain output that indicates that the

device wishes an interrupt service. The device can request an

interrupt when it finishes an operation or needs more data to

process. Under what conditions the device generates an

interrupt can be configured through the user configuration

registers. This pin remains LOW until a Read Interrupt command

is executed.

MOSI

SPI Master Out, Slave In. Serial data input from Master and

Open Drain

SPI Slave Select input. This is an active LOW input used to

select the device to respond to an SPI transaction.

SCLK

SPI Serial clock input.

Chip Select (active LOW) Pin must be LOW to access WTS701

device.

R/ B

Ready/busy signal; This pin defaults HIGH indicating the device

is ready for data transfer. The pin is driven LOW to handshake a

pause in SPI data transfer and Open Drain.

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