UPD784938 Datasheet, PDF (47/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

CHAPTER 1 GENERAL
1.6 List of Functions
Part Number µPD784935
µPD784936
µPD784937
µPD784938
µPD78F4938
Item
Number of basic instructions
113
(mnemonics)
General-purpose register
Minimum instruction execution time
8 bits × 32 registers × 8 banks, or 16 bits × 8 registers × 8 banks (memory mapping)
320 ns/636 ns/1.27 µs/2.54 µs (@6.29-MHz operation)
160 ns/320 ns/636 ns/1.27 µs (@12.58-MHz operation)
Internal
memory
ROM
96 Kbytes
(mask ROM)
128 Kbytes
(mask ROM)
192 Kbytes
(mask ROM)
256 Kbytes
(mask ROM)
256 Kbytes
(flash memory)
RAM
5,120 bytes
6,656 bytes
8,192 bytes
10,240 bytes
Memory space
1 Mbyte with program and data memories combined
I/O port
Total
80
Input
8
I/O
72
Pins with LED direct drive output 24
ancillary _{Transistor direct drive 8}
functions^Note
N-ch open-drain
4
Real-time output port
4 bits × 2, or 8 bits × 1
IEBus controller
Internal (simple version)
Timer/counter
Timer/event counter 0 (16 bits): Timer counter × 1
Capture register × 1
Compare register × 2
Pulse output
• Toggle output
• PWM/PPG output
• One-shot pulse output
Timer/event counter 1 (16 bits): Timer counter × 1
Capture register × 1
Capture/compare register × 1
Compare register × 1
Timer/event counter 2:
Timer counter × 1
Capture register × 1
Capture/compare register × 1
Compare register × 1
Timer 3:
Timer counter × 1
Compare register × 1
Real-time output port
Pulse output
• Toggle output
• PWM/PPG output
Watch timer
Generates interrupt request at intervals of 0.5 second (internal watch clock oscillator)
Main clock (12.58 MHz (MAX.)) or watch clock (32.7 kHz) selectable as input clock
Clock output
PWM output
Selectable from fCLK, fCLK/2, fCLK/4, fCLK/8, and fCLK/16 (can also be used as 1-bit output port)
12-bit resolution × 2 channels
Serial interface
UART/IOE (3-wire serial I/O): 2 channels (with baud rate generator)
CSI (3-wire serial I/O):
2 channels
A/D converter
Watchdog timer
8-bit resolution × 8 channels
1 channel
Standby
HALT/STOP/IDLE mode
Note The pins with ancillary functions are included in the I/O pins.
Preliminary User’s Manual U13987EJ1V0UM00
47