LC72322

Ordering number : 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. It features a large-capacity ROM, a highly efficient instruction set, and powerful hardware. Functions 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 Input ports*: One dedicated key input port and one high-breakdown voltage port Output ports*: Two dedicated key output ports, one high-breakdown voltage open-drain port Two CMOS output ports (of which one can be switched to be used as LCD driver outputs) Seven CMOS output ports (mask option switchable to use as LCD ports) I/O ports*: One switchable between input and output in four-bit units and one switchable between input and output in one-bit units Note: * Each port consists of four bits. This LSI can easily use CCB that is SANYO’s original bus format. Program runaway can be detected and a special ad...