SA9109B

sames

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3.

LCD Driver

The SA9109B has an on-chip LCD driver capable of driving a 4 backplane, 7 digit

(7 segment) display, as well as 6 announciators.

The backplane repetition frequency is approximately 90Hz.

The most significant digit is addressed by columns S[13] and S[12] and the least

significant digit by S[1] and S[0]. Announciators for the 4 tariff registers, the total

register and energy direction are available on the `h' segment of the 6 least

significant digits. The display segments are addressed via the column outputs given

in the table below:

GN D

DD

V

VO LTA G E

SEN S O R

IN P U T

DR-01254

IV N

SS

V

IIP

CURRE N T

SEN S O R

IN P U TS

IIN

SS

V

DD

SS

V

V

VDD