NEC NEC PD78081, User Manual

Page: 35 / 274

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