LC72322 Overview
EN4797A CMOS LSI LC72322 Single-Chip Microcontroller with PLL and LCD Driver Overview The LC72322 is a single-chip microcontroller for use in electronic tuning applications. It includes on chip both LCD drivers and a PLL circuit that can operate at up to 150 MHz.
LC72322 Key Features
- Stack: Eight levels
- Fast programmable divider
- General-purpose counters: HCTR for frequency measurement and LCTR for frequency or period measurement
- LCD driver for displays with up to 56 segments (1/2 duty, 1/2 bias)
- Program memory (ROM): 4 k words by 16 bits
- Data memory (RAM): 256 4-bit digits
- All instructions are single-word instructions
- Cycle time: 2.67 µs, 13.33 µs, or 40.00 µs (option)
- Unlock FF: 0.55 µs detection, 1.1 µs detection
- Timer FF: 1 ms, 5ms, 25ms, 125ms