Service manual

34
GMS30112-R098 (4-bit Single Chip Microcomputer for Remote control)
(1) General Description
The GMS30112-R098 is 4-bit single chip CMOS microcomputer.
(2) Feature
• program memory : 1024 bytes
• data memory : 32 x 4 bits
• 43 types of instruction set
• 3 levels of subroutine nesting
• 1 bit output port for a large current (REMOUT signal)
• operating frequency : 300kHz - 1 MHz
• instruction cycle : 12.5 usec @ 480kHz
• CMOS process ( single 3.0 V power supply )
• stop mode (through internal instruction)
• released stop mode by key input (masked option)
• built in capacitor for ceramic oscillation circuit (masked option)
• built in a watch dog timer(WDT)
• low operating voltage (2.0 V to 4.0 V)
(3) Block Diagram