UPD75104 Overview
µPD75108 is a 4-bit single-chip microputer integrating timer/event counters, serial interface, and vector interrupt function, in addition to a CPU, ROM, RAM, and I/O ports, on a single chip. Operating at high speeds, the microputer allows data to be manipulated in units of 1, 4, or 8 bits. In addition, various bit manipulation instructions are provided to reinforce I/O manipulation capability.
UPD75104 Key Features
- Internal memory
- Data memory (RAM) : 512 × 4 bits ( µPD75108) : 320 × 4 bits ( µPD75106, 75104)
- New architecture “75X series” rivaling 8-bit microputers
- 43 systematically organized instructions
- A wealth of bit manipulation instructions
- 8-bit data transfer, pare, operation, increment, and decrement instructions
- 1-byte relative branch instructions
- GETI instruction executing 2-/3-byte instruction with one byte
- High speed. Minimum instruction execution time: 0.95 µs (at 4.19 MHz), 5 V
- Power-saving, instruction time change function: 0.95 µ s/1.91 µs/15.3 µs (at 4.19 MHz)