The µPD70320 (V25) is a single-chip microcontroller on which 16-bit CPU, RAM, serial interface, timer, DMA controller, interrupt controller, etc. are all integrated. The µPD70320 is compatible with the 8/16-bit microprocessor µPD70108/70116 (V20TM/V30TM) on the software level.

FEATURES

• Internal 16-bit architecture and external 8-bit data bus

• Compatible with µPD70108/70116 (in native mode) on software level (some instructions added)

• Minimum instruction cycle : 400 ns/5 MHz (µPD70320) 250 ns/8 MHz (µPD70320-8)

• On-chip RAM : 256 words × 8 bits

• Input port (port T) with comparator : 8 bits

• I/O lines (input port : 4 bits, input/output port : 20 bits)

• Serial interface (internal dedicated baud rate generator) : 2 channels Asynchronous mode and I/O interface mode

• Interrupt controller

• Programmable priority (8 levels)

• Vectored interrupt function

• Register bank switching function

• Macro service function

• DRAM and pseudo SRAM refreshing functions

• DMA controller : 2 channels

• 16-bit timer : 2 channels

• Time base counter

• On-chip clock generator

• Programmable wait function

• Standby function (STOP/HALT)