Description
The CXP508L4/508L6 is a CMOS 4-bit microcomputer which consists of 4-bit CPU, ROM, RAM, I/O port, 8-bit timer, 8-bit timer/counter, 18-bit time base timer, 8-bit serial I/O, vector interruption, and a liquid crystal displayer (LCD) controller/driver. They are integrated into a single clip with the standby function etc. which are to be operated at low power consumption.

Features
• Instruction cycle 4µs/2MHz (2.4V to 3.5V)
• ROM capacity 4.096 × 8 bits (CXP508L4) 6.144 × 8 bits (CXP508L6)
• RAM capacity 400 × 4 bits (24 × 4 bits is used in combination with the LCD display memory)
• 32 general purpose I/O ports (For 16 segment outputs)
• LCD controller/driver (Direct drive possible)
    — Optical specification of 24, 20 or 16 segment outputs
    — 1/2, 1/3, 1/4 duty selectable through program
    — 1/3 bias
• 2 external interruption input pins
• 8-bit/4-bit variable serial I/O
• 8-bit timer, 8bit timer/event counter and 18-bit time base timer are independently controllable
• Arithmetic and logical operations possible between the entire RAM area, I/O area and the accumulator by means of memory mapped I/O
• Reference to the entire ROM area is possible with the table look-up instruction
• 2 types of power down models, sleep and stop
• 64-pin plastic SDIP/QFP available
• Piggy back package (CXP5080) available