DS2165Q

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CONTROL REGISTER

The control register establishes idle, algorithm reset, bypass, data format, and channel coding for the

selected channel.

The X-side and Y-side PCM interfaces can be independently disabled (output tri-stated) by IPD. When

IPD is set for both channels, the device enters a low-power standby mode. In this mode, the serial port

must not be operated faster than 39kHz.

ALRST resets the algorithm coefficients for the selected channel to their initial values. ALRST is cleared

by the device when the algorithm reset is complete.

Table 1. PIN DESCRIPTION

PIN

SYMBOL

TYPE

FUNCTION

2

RST

I

Reset. A high-low-high transition resets the algorithm. The device should be

reset on power-up and when changing to or from the hardware mode.

3

4

TM0

TM1

I

6

7

8

9

10

11

A0

A1

A2

A3

A4

A5

I

Address Select. A0 = LSB, A5 = MSB. Must match address/command word

to enable the serial port.

12

SPS

I

select the hardware mode.

13

MCLK

I

Master Clock. 10MHz clock for the ADPCM processing engine; may be

asynchronous to SCLK, CLKX, and CLKY.

14

VSS

—

Signal Ground. 0V

16

XIN

I

X Data In. Sampled on falling edge of CLKX during selected time slots.

17

CLKX

I

X Data Clock. Data clock for the X-side PCM interface; must be

synchronous with FSX.

18

FSX

I

X Frame Sync. 8kHz frame sync for the X-side PCM interface.

20

XOUT

O

X Data Output. Updated on rising edge of CLKX during selected time slots.

21

SCLK

I

Serial Data Clock. Used to write to the serial port registers.

22

SDI

I

Serial Data In. Data for on-board control registers; sampled on the rising

edge of SCLK. LSB sent first.

23

CS

I

Chip Select. Must be low to write to the serial port.

24

YOUT

O

Y Data Output. Updated on rising edge of CLKY during selected time slots.

25

FSY

I

Y Frame Sync. 8kHz frame sync for the Y-side PCM interface.

26

CLKY

I

Y Data Clock. Data clock for the Y-side PCM interface; must be

synchronous with FSY.

27

YIN

I

Y Data In. Sampled on falling edge of CLKY during selected time slots.

28

VDD

—

Positive Supply. 5.0V (3.0V for DS2165QL)