CYRUSTEK CO.

ADC with serial output

Pin Description

Pin No.

Symbol

Type

Description

1

VREF-

-

Low differential reference input connection.

2

VREF+

-

High differential reference input connection.

3

DGND

-

Pull high to V+ all LCD segments will be activated.

4

OSC3

-

Crystal oscillator connection.(RC)

5

OSC2

-

Crystal oscillator connection.(output)

6

OSC1

-

Crystal oscillator connection.(input)

7

INT

O

Integration status flag.

8

FREQ/VOLT

I

Frequency counter/voltage measurement select pin. Connecting to V+

will enable the frequency counter, connecting to TEST1 or open will ex-

ecute voltage measurement. This pin is internally pull down to TEST1.

9

V+

P

Positive supply voltage.

10

CONT/-/MHz

O

LCD segment drive. (Continuity., polarity, MHz)

11

B4/C4/DP3

O

LCD segment drive. (B4, C4, decimal point3)

12

KHz/F3/E3

O

LCD segment drive. (KHz, F3, E3)

13

A3/G3/D3

O

LCD segment drive. (A3, G3, D3)

14

B3/C3/DP2

O

LCD segment drive. (B3, C3, decimal point2)

15

HOLD/F2/E2

O

LCD segment drive. (Data Hold, F2, E2)

16

A2/G2/D2

O

LCD segment drive. (A2, G2, D2)

17

B2/C2/DP1

O

LCD segment drive. (B2, C2, decimal point 1)

18

MAX/F1/E1

O

LCD segment drive. (Max, F1, E1)

19

A1/G1/D1

O

LCD segment drive. (A1, G1, D1)

20

B1/C1/BAT

O

LCD segment drive. (B1, C1, low battery)

21

COM1

O

LCD common drive#1.

22

COM2

O

LCD common drive#2.

23

COM3

O

LCD common drive#3.

24

FREQ-in

I

Frequency counter input pin.

25

DINT

O

De-Integration status flag.

26

ANNUNC

O

Square wave output at the LCD backplane frequency, synchronized to

COM1. Connecting an LCD segment to ANNUNC pin turns it on; con-

necting to backplane turns it off.

27

DP1

I

1st decimal point selection input for voltage measurement, internally

pulled-down to TEST1.

28

DP2

I

2nd decimal point selection input for voltage measurement, internally

pulled-down to TEST1.

29

DP3

I

3rd decimal point selection input for voltage measurement, internally

pulled-down to TEST1.

30

RESET

I

Reset input pin. Connecting to V+ will cancel both MAX/MIN and

Hold functions.

31

MAX

I

MAX input pin. Pulse to V+ to enable MAX function.

32

HOLD

I

Hold input pin. Connecting to V+ for hold function.

33

LB

O

Low battery flag. Pull high if low battery.

continued on next page

This table is for ES5108L

6

November 23, 2006