Chapter 1 Outline; Features - NEC mPD780065 Series Preliminary User's Manual

1.1 Features

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Internal Memory
Type
Part Number
µ PD780065
µ PD78F0066
Note The capacity of internal flash memory can be changed by means of the memory size switching register (IMS).
•
External Memory Expansion Space: 64 Kbytes
Minimum instruction execution time changeable from high speed (0.24 µ s: @ 8.38-MHz operation with main system
•
clock) to ultra-low speed (122 µ 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
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Sixty I/O ports
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8-bit resolution A/D converter: 8 channels
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Serial interface:
• 3-wire serial I/O mode (provided with automatic transmission/reception function): 1 channel
• 3-wire serial I/O mode: 1 channel
• 2-wire serial I/O mode: 1 channel
• UART mode:
•
Timer: Five channels
• 16-bit timer/event counter: 1 channel
• 8-bit timer/event counter:
• Watch timer: 1 channel
• Watchdog timer: 1 channel
•
Vectored interrupts: 20
•
Two types of on-chip clock oscillators (main system clock and subsystem clock)
•
Power supply voltage: V

CHAPTER 1 OUTLINE

Program Memory
(Mask ROM/Flash memory)
40 Kbytes
Note
48 Kbytes
4 channels
1 channel
2 channels
= 2.7 to 5.5 V
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Preliminary User's Manual U13420EJ2V0UM00
Data Memory
High-Speed RAM Expansion RAM
1024 bytes 4096 bytes
Buffer RAM
32 bytes
25