11

Pinout

HMP9701A (TQFP)

TOP VIEW

LINE_OUT_R

LINE_OUT_L

NC

RESERVED

NC

AFILT2

AFILT1

AGND

AFILT3

XTL_IN

XTL_OUT

GND

SDATA_OUT

BIT_CLK

GND

SDATA_IN

SYNC

RESET

PC_BEEP

1

2

3

4

5

6

7

8

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

9

10

11

12

13 14 15 16

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

Pin Descriptions

NAME

TQFP PIN

NUMBER

INPUT/

OUTPUT

DESCRIPTION

DIGITAL I/O

RESET

11

I

RESET - This active low signal causes a HMP9701A hardware reset that will return the control/sta-

tus registers to their default conditions.

SYNC

10

I

SYNC - 48kHz sync pulse which defines the beginning of serial audio I/O frames. Note: must be

synchronous to BIT_CLK.

BIT_CLK

6

O

BIT Clock - 12.288MHz serial data clock derived by dividing down 24.576MHz crystal input.

SDATA_OUT

5

I

Serial Data Out - Output bit stream that contains audio playback samples as well as control data.

This input is sampled on the falling edge of BIT_CLK.

SDATA_IN

8

O

Serial Data In - Input bit stream that contains recorded audio samples as well as codec status in-

formation. Data output on the rising edge of BIT_CLK.

ANALOG I/O

PC_BEEP

12

I

PC Beep. Mono Input for PC Beep pass through to LINE_OUT. This input is attenuated from 0dB

to 45dB in 3dB steps and then summed with left and right line outputs (LINE_OUT_L,

LINE_OUT_R)

PHONE

13

I

Phone. Mono Input from telephony subsystem speaker phone (or DLP - Down Line Phone)

MIC1

21

I

Microphone Input 1. The MIC input may be either line-level or -20dB from line-level. In the latter

case, a software controlled 20dB gain block may be activated.

MIC2

22

I

Microphone Input 2. The MIC input may be either line-level or -20dB from line-level. In the latter

case, a software controlled 20dB gain block may be activated.

LINE_IN_L

23

I

Left Line Input. The left line-level may be selected for recording via one of the stereo ADC’s via the

Input Mux. In addition, this input can be gained/attenuated from +12dB to -34.5dB in 1.5dB steps

and then summed with left line output (LINE_OUT_L).

HMP9701A