UPD70325

DATA SHEET MOS INTEGRATED CIRCUIT µPD70325 V25+TM 16/8-BIT SINGLE-CHIP MICROCONTROLLER The µPD70325 (V25+) is a single-chip microcontroller on which 16-bit CPU, RAM, serial interface, timer, DMA controller, interrupt controller, etc. are all integrated. The µPD70325 is software compatible with the 16/8-bit singlechip microcontroller µPD70320 (V25TM). The V25+ greatly improves the DMA responsivity and transfer rate compared to the V25. FEATURES Software compatible with V25 Software compatible with µPD70108/70116 (in native mode) (some instructions added) Internal 16-bit architecture and external 8-bit data bus 3-stage pipeline method Minimum instruction cycle : 250 ns/8 MHz (external 16 MHz) : 200 ns/10 MHz (external 20 MHz) Memory space 1 Mbyte On-chip RAM : 256 words × 8 bits Register bank (memory mapped method) : 8 banks Input port (port T) with comparator : 8 bits I/O lines (input port : 4 bits, input/output ports : 20 bits) Serial interface : 2 channels Internal dedicated baud rate generator Asynchronous mode and I/O interface mode Interrupt controller Programmable priority (8 levels) 3 types of interrupt response method Vectored interrupt function, register bank switching function, macro service function DRAM and pseudo SRAM refreshing function DMA controller : 2 channels 4 types of DMA transfer mode Transfer rate Maximum 4 Mbytes/second (when stop control is not executed by DMARQ pin in demand release mode) Maximum 2 Mb...