NJU6452A

The NJU6452A is a bit map LCD driver to display graphics or characters.It contains 2,560 bit display data RAM, microprocessor interface circuits, instruction decoder,and 16-common and 61-segment drivers.The bit image display data  sent from 8- or 16-bit MPU are stored in the display data RAM and drives Dot Matrix LCD Panel by the common and segment drivers.The 16-common and 61-segment drivers  can drive graphics or 12-character 2-line with icon data.The NJU6452A can combine with the NJU6452A or 6453A to expand the display capacity to 32 x 122 dots or 16 x 141 dots  of graphics or character display by using the extension function of NJU6452A.Furthermore,low current consumption due to the external clock input and wide operating voltage are useful apply to the small sized battery operated items.

Features of the NJU6452A are:(1)direct correspondence between display data RAM and LCD pixel; (2)display data RAM--2,560 bits 80 x 8 x 4; (3)direct interface with 8- or 16-bit MPU(both of 68 and 80 type MPU can connect directly); (4)extension function (can combine with NJU6452A or 6453A); (5)read out from the display data RAM; (6)16-common and 61-segment drivers; (7)programmable duty ratio;1/16 or 1/32 duty; (8)useful instruction set:display data read/write, display ON/OFF cont, display data RAM address set, status read, display starting line set, static drive ON/OFF, duty ratio setting, and read modify write,; (9)low power consumption; (10)external clock input(2kHz); (11)operating voltage:2.4V~6.OV; (12)LCD driving voltage:3.0V~13.5V; (13)package outline:QFP 100/chip; (14)C-MOS technology.

The absolute maximum ratings of the NJU6452A can be summarized as:(1)supply voltage(1) Vdd:-0.3 to 7.0V;(2)storage temperature:-55 to +125;(3)operating temperature:-30 to 80 ;(4)supply voltage(2):Vdd-13.5 to Vdd+13.5V;(5)input voltage:-0.3 to Vdd+0.3V.After this instruction is executed, the column address increase "1" automatically when display data write instruction execution,but the address is not changed when the display data read instruction execution.This status continues during end instruction execution.When the end instruction is entered the column address back to the address where Read hbdify Write instruction entering.By this function, the load of MPU for example cyclic data writing operation like as cursor blink etc.,can be reduced.