DATA SHEET
MOS INTEGRATED CIRCUIT
µPD17230,17231,17232,17233,17234,17235,17236
4-BIT SINGLE-CHIP MICROCONTROLLER
FOR SMALL GENERAL-PURPOSE INFRARED
REMOTE CONTROL TRANSMITTER
DESCRIPTION
µPD17230, 17231, 17232, 17233, 17234, 17235, 17236 (hereafter called µPD17236 subseries) are 4-bit single-
chip microcontrollers for small general-purpose infrared remote control transmitters.
It employs a 17K architecture of general-purpose register type devices for the CPU, and can directly execute
operations between memories instead of the conventional method of executing operations through the accumulator.
Moreover, all the instructions are 16-bit 1-word instructions which can be programmed efficiently.
In addition, a one-time PROM model, µPD17P236Note, to which data can be written only once, is also available.
It is convenient either for evaluating the µPD17236 subseries programs or small-scale production of application
systems.
Note Under development
Detailed functions are described in the following manual. Be sure to read this manual when designing your
system.
µPD172×× Subseries User's Manual: U12795E
FEATURES
•
•
•
Infrared remote controller carrier generator circuit (REM output)
17K architecture: General-purpose register system
Program memory (ROM), Data memory (RAM)
µPD17230
µPD17231
µPD17232
µPD17233
µPD17234
µPD17235
µPD17236
Program
4 K bytes
8 K bytes
12 K bytes
16 K bytes
20 K bytes
24 K bytes
32 K bytes
memory (ROM) (2048 × 16) (4096 × 16) (6144 × 16) (8192 × 16) (10240 × 16) (12288 × 16) (16384 × 16)
Data memory
(RAM)
223 × 4 bits
•
•
•
8-bit timer
: 1 channel
Basic internal timer/Watchdog timer : 1 channel
Instruction execution time (can be changed in two steps)
at fX = 4 MHz
at fX = 8 MHz
: 4 µs (high-speed mode)/8 µs (ordinary mode)
: 2 µs (high-speed mode)/4 µs (ordinary mode)
•
•
•
External interrupt pin (INT)
I/O pins
: 1
: 21
Supply voltage
: VDD = 2.2 to 3.6 V (at fX = 8 MHz (high-speed mode))
VDD = 2.0 to 3.6 V (at fX = 4 MHz (high-speed mode))
•
Low-voltage detector circuit (mask option)
Unless otherwise specified, the µPD17236 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 devices/types available in every country. Please check with local NEC representative for availability
and additional information.
Document No. U14360EJ1V0DS00 (1st edition)
Date Published July 1999 N CP (K)
Printed in Japan
1999
©