UPD17225 Overview
µPD17225, 17226, 17227, 17228 (hereafter called µPD17225 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...
UPD17225 Key Features
- Infrared remote controller carrier generator circuit (REM output)
- 17K architecture: General-purpose register system
- Program memory (ROM), Data memory (RAM)
- 8-bit timer
- Basic internal timer/Watchdog timer : 1 channel (WDOUT output)
- Instruction execution time (can be changed in two steps) at fX = 4 MHz at fX = 8 MHz
- External interrupt pin (INT)
- I/O pins
- Low-voltage detector circuit (mask option) Unless otherwise specified, the µPD17225 is treated as the representative mod