ICM7211AM

FN3158 Rev 8.00

Page 4 of 9

October 22, 2015

under Operating Characteristics. For lowest power consumption, input signals should swing over the full supply.

INPUT

DIP TERMINAL

CONDITIONS

FUNCTION

B0

27

Ones (Least Significant)

Data Input Bits

B1

28

Twos

B2

29

Fours

B3

30

Eights (Most Significant)

OSC

36

Floating or with External

Oscillator Input

Disables BP output devices, allowing segments to be synchronized to an

external signal input at the BP terminal (Pin 5).

Interface Input Configuration

INPUT

DESCRIPTION

DIP TERMINAL

CONDITIONS

FUNCTION

DA1

Digit Address

Bit 1 (LSB)

31

DA1 and DA2 serve as a 2-bit Digit Address Input

DA2, DA1 = 00 selects D4

DA2, DA1 = 01 selects D3

DA2, DA1 = 10 selects D2

DA2, DA1 = 11 selects D1

DA2

Digit Address

Bit 2 (MSB)

32

CS1

Chip Select 1

33

When both CS1 and CS2 are taken low, the data at the Data and Digit

Select code inputs are written into the input latches. On the rising edge

of either Chip Select, the data is decoded and written into the output

latches.

CS2

Chip Select 2

34

Timing Diagram

FIGURE 1. MICROPROCESSOR INTERFACE INPUT

CS1

(CS2)

CS2

(CS1)

DATA AND

DIGIT

ADDRESS

= DON’T CARE