LH1562

6

FUNCTIONAL DESCRIPTION

Pin Functions

(Segment mode)

SYMBOL

FUNCTION

Logic system power supply pin, connected to +2.5 to +5.5 V.

Bias power supply pins for LCD drive voltage

• Normally use the bias voltages set by a resistor divider.

voltage which is assigned by specification for each power pin.

Input pins for display data

• Refer to "RELATIONSHIP BETWEEN THE DISPLAY DATA AND LCD DRIVE OUTPUT

PINS" in Functional Operations.

Ground pin, connected to 0 V.

Control input pin for output of non-select level

• The input signal is level-shifted from logic voltage level to LCD drive voltage level, and

controls the LCD drive circuit.

• When set to "L", the contents of the line latch are reset, but the display data are read in the

data latch regardless of the condition of

. When the

function is canceled,

the next falling edge of the LP. At that time, if

removal time does not correspond

to what is shown in AC characteristics, it can not output the reading data correctly.

• Table of truth values is shown in "TRUTH TABLE" in Functional Operations.

Clock input pin for taking display data

• Data is read at the falling edge of the clock pulse.

XCK

L/R

Input pin for selecting the reading direction of display data

• Refer to "RELATIONSHIP BETWEEN THE DISPLAY DATA AND LCD DRIVE OUTPUT

PINS" in Functional Operations.

LP

Latch pulse input pin for display data

• Data is latched at the falling edge of the clock pulse.