Chapter 1 Outline; Features - NEC PD78081(A) User Manual

1.1 Features

On-chip ROM and RAM
Note The capacities of internal PROM and internal high-speed RAM can be changed by means of the memory
size switching register (IMS).
Instruction execution time changeable from high speed (0.4 s: In main system clock 5.0 MHz operation) to low
speed (12.8 s: In main system clock 5.0 MHz operation)
Instruction set suited to system control
• Bit manipulation possible in all address spaces
• Multiply and divide instructions
33 I/O ports
8-bit resolution A/D converter: 8 channels
Serial interface: 1 channel
• 3-wire serial I/O/UART mode: 1 channel
Timer: 3 channels
• 8-bit timer/event counter : 2 channels
• Watchdog timer : 1 channel
Vectored Interrupt Source : 13
Supply voltage: V
DD

CHAPTER 1 OUTLINE

CHAPTER 1 OUTLINE
Type
Program Memory
(ROM)
Part Number
PD78081 8 Kbytes
PD78082 16 Kbytes
PD78P083
24 Kbytes (Note)
= 1.8 to 5.5 V
Data Memory
(Internal High-Speed RAM)
256 bytes
384 bytes
512 bytes (Note)
1