Rev. 1.00

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Rev. 1.00

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HT16K23

RAM Mapping 20*4/16*8 LCD Controller Driver with keyscan

Timing Diagrams

●

SDA

SCL

S

Sr

P

S

SDA

OUT

●

Power-on Reset Timing

Functional Description

Power-on Reset

When power is turned on, the IC is initialised by the internal power-on reset circuit. The status of the

internal circuit after initialization is as follows:

● Display mode is 20*4, 20 segments and 4 commons.

● System oscillator is off.

● LCD Display is off.

● Key scan stopped.

● All common pins are set to VSS.

● All segment pins are in an input state.

● SEG19/COM4/INT pin is set to segment driver.

● The control registers, key data RAM and display data RAM are set to a default value.

the reset procedure.