NJU6533
! FUNCTION DESCRIPTION
(1) Block Function
• Oscillator
The oscillator includes a built-in capacitor and an external resistor. It generates clock signal for LCD driving.
use external clock, input the clock signal to OSC1 and keep OSC2 open.
When
• Decoder
Input serial data is decoded and sent to the appropriate block.
• Command Register
Command data is written to this 8 bits command register to control NJU6533 operation.
• Display Data Register
Data is written to this 8 bits register as display data.
• Latch Circuit
Data stored in display data register is assigned to the corresponding SEG/port.
• Segment Driver/General Purpose Ports
Basing on display data, segment drivers output LCD SEG driving signal.
And, SEG29/P1 ~ SEG32/P4 pins can be selected as segment driver output or general-purpose ports by instruction.
• Common Driver
Common drivers output LCD COM driving signal.
• Power On Reset
When power is on, NJU6533 is automatically initialized. And if RSTb=”L”, NJU6533 is reset too.
Ver.2004-03-05
-3-