Outline Of Function - NEC PD78081(A) User Manual

1.8 Outline of Function

Part Number
Item
Internal memory ROM
High-speed RAM
Memory space
General register
Instruction cycle
Instruction set
I/O ports
A/D converter
Serial interface
Timer
Timer output
Clock output
Buzzer output
Vectored Maskable
interrupt Non-maskable
source Software
Supply voltage
Operating ambient temperature
Package
Note Internal PROM and high-speed RAM capacities can be changed by setting the internal memory size
switching register (IMS).
12
CHAPTER 1 OUTLINE
PD78081
Mask ROM
8 Kbytes 16 Kbytes
256 bytes 384 bytes
64 Kbytes
8 bits 32 registers (8 bits
Instruction execution time variable function is integrated.
0.4 s/0.8 s/1.6 s/3.2 s/6.4 s/12.8 s (@5.0-MHz operation with main system clock)
• 16-bit operation
• Multiply/divide (8 bits 8 bits, 16 bits
• Bit manipulation (set, reset, test, Boolean operation)
• BCD adjust, etc.
Total : 33
• CMOS input : 1
• CMOS input/output : 32
• 8-bit resolution 8 channels
• 3-wire serial I/O/UART mode selectable: 1 channel
• 8-bit timer/event counter: 2 channels
• Watchdog timer: 1 channel
2 pins (8-bit PWM output enable)
19.5 kHz, 39.1 kHz, 78.1 kHz, 156 kHz, 313 kHz, 625 kHz, 1.25 MHz, 2.5 MHz,
and 5.0 MHz (@ 5.0-MHz operation with main system clock)
1.2 kHz, 2.4 kHz, 4.9 kHz, and 9.8 kHz
(@ 5.0-MHz operation with main system clock)
Internal : 8 external : 3
Internal : 1
1
V = 1.8 to 5.5 V
DD
T = –40 to +85 C
A
• 42-pin plastic shrink DIP (600 mil)
• 44-pin plastic QFP (10 10 mm)
• 42-pin ceramic shrink DIP (with window) (600 mil) ( PD78P083 only)
PD78082
PROM
24 Kbytes
512 bytes
8 registers 4 banks)
8 bits)
PD78083
Note
Note