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UPD784938 Datasheet(PDF) 47 Page - NEC

Part # UPD784938
Description  16-Bit Single-Chip Microcontrollers
Download  733 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD784938 Datasheet(HTML) 47 Page - NEC

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CHAPTER 1
GENERAL
47
Preliminary User’s Manual U13987EJ1V0UM00
1.6 List of Functions
Part Number
µPD784935
µPD784936
µPD784937
µPD784938
µPD78F4938
Item
Number of basic instructions
113
(mnemonics)
General-purpose register
8 bits
× 32 registers × 8 banks, or 16 bits × 8 registers × 8 banks (memory mapping)
Minimum instruction execution time
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
ROM
96 Kbytes
128 Kbytes
192 Kbytes
256 Kbytes
256 Kbytes
memory
(mask ROM)
(mask ROM)
(mask ROM)
(mask ROM)
(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
functionsNote
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
Pulse output
Capture register
× 1
• Toggle output
Compare register
× 2
• PWM/PPG output
• One-shot pulse output
Timer/event counter 1 (16 bits): Timer counter
× 1
Real-time output port
Capture register
× 1
Capture/compare register
× 1
Compare register
× 1
Timer/event counter 2:
Timer counter
× 1
Pulse output
Capture register
× 1
• Toggle output
Capture/compare register
× 1
• PWM/PPG output
Compare register
× 1
Timer 3:
Timer counter
× 1
Compare register
× 1
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
Selectable from fCLK, fCLK/2, fCLK/4, fCLK/8, and fCLK/16 (can also be used as 1-bit output port)
PWM output
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
8-bit resolution
× 8 channels
Watchdog timer
1 channel
Standby
HALT/STOP/IDLE mode
Note
The pins with ancillary functions are included in the I/O pins.


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