Description
The CXP5084/5086 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, power on reset function 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 3.8µs/4.19MHz 1.9µs/4.19MHz (High speed version)
• ROM capacity 4096 × 8 bits (CXP5084) 6144 × 8 bits (CXP5086)
• RAM capacity 400 × 4 bits (Including stack, display area)
• 32 general purpose I/O ports
• LCD controller/driver (Direct drive possible)
    — Optional 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, 8-bit 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 modes: sleep and stop
• Power on reset circuit (Mask option)
• Available option of either crystal oscillation or CR oscillation (mask option) types for the oscillation circuit
• 64-pin plastic SDIP/QFP available
• Piggyback package (CXP5080) available