DESCRIPTION

The µPD17P228 is a model of the µPD17228 with a one-time PROM instead of an internal mask ROM.

Since the user can write programs to the µPD17P228, it is ideal for experimental production or small-scale production of the µPD17225, 17226, 17227 or 17228 systems.

When reading this document, also read the documents related to the µPD17225, 17226, 17227 and 17228.

FEATURES

• Pin compatible with µPD17225, 17226, 17227 and 17228 (except PROM programming function)

• Carrier generator circuit for infrared remote controller (REM output)

• 17K architecture: General-purpose register method

• Program memory (one-time PROM): 16 Kbytes (8192 × 16)

• Data memory (RAM): 223 × 4 bits

• Pull-up resistor can be connected to RESET pin

• Low-voltage detection circuit (WDOUT output)

• Supply voltage: VDD = 2.2 to 3.6 V (fx = 4 MHz: high-speed mode, 4 µs)

VDD = 3.0 to 3.6 V (fx = 8 MHz: high-speed mode, 2 µs)

APPLICATIONS

Preset remote controllers, toys, and portable systems