UPD17240 Datasheet, PDF (1/102 Pages) NEC – 4-BIT SINGLE-CHIP MICROCONTROLLERS FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTERS

DATA SHEET
MOS INTEGRATED CIRCUIT
µPD17240,17241,17242,17243,17244,17245,17246
4-BIT SINGLE-CHIP MICROCONTROLLERS
FOR SMALL GENERAL-PURPOSE INFRARED
REMOTE CONTROL TRANSMITTERS
DESCRIPTION
The µPD17240, 17241, 17242, 17243, 17244, 17245, 17246 (hereafter called the µPD17246 Subseries) are 4-
bit single-chip microcontrollers for small general-purpose infrared remote control transmitters.
This subseries employs 17K general-purpose register system architecture for the CPU, and can directly execute
operations between data memories instead of the conventional method of executing operations through an
accumulator. Moreover, all the instructions are 16-bit/1-word instructions, enabling efficient programming.
In addition, a one-time PROM model, the µPD17P246, to which data can be written only once, is also available.
This product is convenient either for evaluating the µPD17246 Subseries programs or for small-scale production of
application systems.
Detailed function descriptions are provided in the following user's manual. Be sure to read them before
designing.
µPD172×× Subseries User's Manual: U12795E
FEATURES
• Infrared remote controller carrier generator (REM output)
• 17K architecture: General-purpose register system
• Program memory (ROM), data memory (RAM)
µPD17240 µPD17241 µPD17242 µPD17243 µPD17244 µPD17245 µPD17246
Program
4 KB
8 KB
12 KB
16 KB
20 KB
24 KB
32 KB
memory (ROM) (2,048 × 16) (4,096 × 16) (6,144 × 16) (8,192 × 16) (10,240 × 16) (12,288 × 16) (16,384 × 16)
Data memory 447 × 4 bits
(RAM)
• 8-bit timer:
1 channel
• Basic interval timer/watchdog timer: 1 channel
• Instruction execution time (can be changed in two steps)
@ fX = 4 MHz:
4 µs (high-speed mode)/8 µs (normal mode)
• External interrupt pin (INT/P1B0): 1
• I/O pins:
24
• Supply voltage:
VDD = 2.0 to 3.6 V
• On-chip RAM retention detector
• Low-voltage detector (mask option)
Unless otherwise specified, the µPD17246 is treated as the representative model throughout this document.
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all products and/or types are available in every country. Please check with an NEC Electronics
sales representative for availability and additional information.
Document No. U15002EJ1V0DS00 (1st edition)
Date Published April 2003 N CP (K)
Printed in Japan
The mark shows major revised points.
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