Chapter 1 Outline; Features - NEC 78K0 User Manual

1.1

Features

Minimum instruction execution time can be changed from high speed (0.2
clock) to ultra low-speed (122
General-purpose register: 8 bits × 32 registers (8 bits × 8 registers × 4 banks)
ROM, RAM capacities
Part Number
µ
PD780143
µ
PD780144
µ
PD780146
µ
PD780148
µ
PD78F0148
Note The internal flash memory and internal expansion RAM capacities can be changed using the internal
memory size switching register (IMS) and the internal expansion RAM size switching register (IXS).
Buffer RAM: 32 bytes (can be used for transfer in 3-wire serial I/O mode with automatic transmit/receive
function)
External memory expansion space: 64 KB (with external bus interface function)
On-chip power-on-clear (POC) circuit and low-voltage detector (LVI)
Short startup is possible via the CPU default start using the on-chip Ring-OSC
On-chip clock monitor function using on-chip Ring-OSC
On-chip watchdog timer (operable with Ring-OSC clock)
On-chip multiplier/divider
On-chip key interrupt function
On-chip clock output/buzzer output controller
On-chip regulator
I/O ports: 67 (N-ch open drain: 4)
Timer
µ
PD780143, 780144: 7 channels
µ
PD780146, 780148, 78F0148: 8 channels
Serial interface
µ
PD780143, 780144: 3 channels
(UART (LIN (Local Interconnect Network)-bus supported): 1 channel, CSI/UART
automatic transmit/receive function: 1 channel)
µ
PD780146, 780148, 78F0148: 4 channels
(UART (LIN (Local Interconnect Network)-bus supported): 1 channel, CSI: 1 channel, CSI/UART
CSI with automatic transmit/receive function: 1 channel)
10-bit resolution A/D converter: 8 channels
Note Select either of the functions of these alternate-function pins.

CHAPTER 1 OUTLINE

µ
s: @ 32.768 kHz operation with subsystem clock)
Item Program Memory
(ROM)
Mask ROM 24 KB
32 KB
48 KB
60 KB
Flash memory 60 KB
User's Manual U15947EJ2V0UD
µ
Internal High-Speed
RAM
1024 bytes
Note
*
s: @ 10 MHz operation with X1 input
Data Memory
Internal Expansion RAM
−
1024 bytes
Note
1024 bytes
Note
: 1 channel, CSI with
Note
: 1 channel,
33