UPD784020 Datasheet, PDF (3/90 Pages) NEC – 16/8-BIT SINGLE-CHIP MICROCOMPUTER

mPD784020, 784021
FUNCTIONS
Item
Product
mPD784020
mPD784021
Number of basic instructions 113
(mnemonics)
General-purpose register
8 bits ¥ 16 registers ¥ 8 banks, or 16 bits ¥ 8 registers ¥ 8 banks (memory mapping)
Minimum instruction execution 160 ns/320 ns/640 ns/1280 ns (at 25 MHz)
time
Internal
memory
ROM
RAM
None
512 bytes
2048 bytes
Memory space
Program and data: 1M byte
I/O ports
Total
46
Input
8
Input/output 34
Output
4
Additional
function
pins^Note
Pins with pull- 32
up resistor
LED direct 8
drive outputs
Transistor
8
direct drive
Real-time output ports
4 bits ¥ 2, or 8 bits ¥ 1
Timer/counter
Timer/counter 0:
(16 bits)
Timer register ¥ 1
Capture register ¥ 1
Compare register ¥ 2
Pulse output capability
Ý Toggle output
Ý PWM/PPG output
Ý One-shot pulse output
Timer/counter 1:
(8/16 bits)
Timer register ¥ 1
Capture register ¥ 1
Capture/compare register ¥ 1
Compare register ¥ 1
Pulse output capability
Ý Real-time output (4 bits ¥ 2)
Timer/counter 2:
(8/16 bits)
Timer register ¥ 1
Capture register ¥ 1
Capture/compare register ¥ 1
Compare register ¥ 1
Pulse output capability
Ý Toggle output
Ý PWM/PPG output
Timer 3
(8/16 bits)
: Timer register ¥ 1
Compare register ¥ 1
PWM outputs
12-bit resolution ¥ 2 channels
Serial interface
UART/IOE (3-wire serial I/O) : 2 channels (incorporating baud rate generator)
CSI (3-wire serial I/O, SBI) : 1 channel
A/D converter
8-bit resolution ¥ 8 channels
D/A converter
8-bit resolution ¥ 2 channels
Watchdog timer
1 channel
Standby
HALT/STOP/IDLE mode
Interrupt
Source
23 (16 internal, 7 external (sampling clock variable input: 1)) + BRK instruction
Software
BRK instruction
Nonmaskable 1 internal, 1 external
Maskable
15 internal, 6 external
Ý 4-level programmable priority
Ý 3 operation statuses: vectored interrupt, macro service, context switching
Supply voltage
VDD = 2.7 to 5.5 V
H
Package
80-pin plastic QFP (14 ¥ 14 mm)
80-pin plastic TQFP (fine pitch) (12 ¥ 12 mm): for the mPD784021 only
H
Note Additional function pins are included in the I/O pins.
3