NJU6572A

The NJU6572A has the following features including Direct Correspondence between Display Data RAM and LCD Pixel;Display Data RAM-2, 560 bits  80 x 8 x 4;Direct Interface with 8- or 16-bit MPU(Both of 68 and 80 type MPU can connect directly);Extension Function (can combine with NJU6572A or 6453A);Read Out From the Display Data RAM;16-common and 61-segment Drivers;Programmable Duty Ratio;1 /16 or 1 /32 Duty.

The NJU6572A 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 NJU6572A can combine with the NJU6572A 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 NJU6572A.Furthermore, low current consumption due to the external clock input and wide operating voltage are useful apply to the small sized battery operated items.

The NJU6572A is operating as one of Pipe-line processor by the bus-holder connecting to the internal data bus to adjust the operation frequency between MPU and the Display Data RAM or Internal Register.For example, when the MPU write the data into the Display Data RAM, the data is held in the bus-holder at once then write into the Display Data RAM by next data write cycle.Therefore high speed data transmission between MPU and NJU6572A is available because of the limitation of access time of NJU6572A looking from MPU is just determined by the cycle time only which ignored the access time of tncc and tos of Display Data RAM.