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PT6959 V1.5

- 13 -

June, 2005

LED Driver IC

PT6959

RECOMMENDED SOFTWARE PROGRAMMING

FLOWCHART

START

SET

COMMAND 2

(Write Data)

SET

COMMAND 2

(READ KEY &

WRITE DATA

INCLUDED)

SET

COMMAND 3

END

INITIAL

SETTING

MAIN

LOOP

SET

COMMAND 3

Clear Display RAM

(See Note 5)

SET

COMMAND 1

MAIN

PROGRAM

SET

COMMAND 4

SET

COMMAND 4

(88H ~ 8FH: Display ON)

Delay 200 ms

SET

COMMAND 1

Notes:

1. Command 1: Display Mode Setting Commands

2. Command 2: Data Setting Commands

3. Command 3: Address Setting Commands

4. Command 4: Display Control Commands

5. When IC power is applied for the first time, the contents of the Display RAM are not defined; thus, it

is strongly suggested that the contents of the Display RAM must be cleared during the initial setting.