Oki Electric Industry MSM6502B
The MSM6502B/6512 is a low-power, 4-bit microcontroller implemented in complementary metal-oxide semiconductor technology. The device is ideally suited to battery-powered systems such as watches and game machines because it can directly drive LCDs with up to 108 picture elements.GENERAL DESCRIPTION
FEATURES
● ROM● RAM
● Number of instructions
● Clock oscillation
● Cycle time
● Timer interrupt
● I/O port Input-output port Input port
● LCD drive
● Buzzer
● Interrupt
● Stack : : : : : : : : : : : : 2000 words ¥ 8 bits 128 words ¥ 4 bits 68 Crystal 32.768 kHz 91.5 ms Dual (16,128 Hz) 2 ports ¥ 4 bits 1 port ¥ 4 bits 108 (4 ¥ 27) picture elements 2000/1000/512 Hz/Soft Three sources (external; two timer sources) Nesting RAM Stack pointer = 7 bits
● Power down : Halt mode available
● Operating power supply voltage : 2.4 V to 3.6 V
● Package options: 56-pin plastic QFP (QFP56-P-910-0.65-K) : (Product name : MSM6502B-¥¥¥GS-K, MSM6512-¥¥¥GS-K) 56-pin plastic QFP (QFP56-P-910-0.65-2K) : (Product name : MSM6502B-¥¥¥GS-2K, MSM6512-¥¥¥GS-2K) ¥¥¥ indicates the code number. 1/12 ¡ Semiconductor BLOCK DIAGRAM INSTRUC– TION DECODER IH R L R O M D A T A PROGRAM MEMORY ROM 2000 ¥ 8bits ACC 4bits C H 8bits ALU L H PCR M L 11bits 11bits H 4bits BUS L 4bits 8bits 8bits H DP L H SP L H IDR L H PC M L 7bits 8bits BZ CONT I INT.