Chapter 2 Outline ( Pd78078Y Subseries); Features - NEC PD78076 User Manual

Pd78078 series; pd78078y series 8-bit single-chip microcontrollers

Table of Contents

Internal high-capacity ROM and RAM

Program Memory

1. The capacity of internal PROM can be changed using the internal memory size switching register

2. The capacity of internal high-speed RAM can be changed using the internal expansion RAM size

switching register (IXS).

External memory expansion space: 64 Kbytes

Minimum instruction execution time changeable from high speed (0.4 s: @ 5.0-MHz operation with main

system clock) to ultra-low speed (122 s: @ 32.768-kHz operation with subsystem clock)

Instruction set suited to system control

Bit manipulation possible in all address spaces

Multiply and divide instructions incorporated

88 I/O port pins: (including eight N-ch open-drain port pins)

8-bit resolution A/D converter: 8 channels

8-bit resolution D/A converter: 2 channels

Serial interface: Three channels

3-wire serial I/O/2-wire serial I/O/I

3-wire serial I/O mode (Automatic transmit/receive function): 1 channel

3-wire serial I/O/UART mode: 1 channel

Timer: Seven channels

16-bit timer/event counter : 1 channel

8-bit timer/event counter

Watchdog timer

24 vectored interrupt sources

Two test inputs

Two types of on-chip clock oscillation circuits (main system clock and subsystem clock)

Power supply voltage: 1.8 to 5.5 V

CHAPTER 2 OUTLINE ( PD78078Y SUBSERIES)

Internal High-Speed RAM Internal Buffer RAM Internal Expansion RAM

C bus mode: 1 channel

: 4 channels