HT46R22/HT46C22 is a trademark of Philips Semiconductors. It is an 8-bit high performance RISC-like microcontroller designed for multiple I/O product applications. It is particularly suitable for use in products such as washing machine controllers and home appliances.
The HT46R22/HT46C22 microcontroller is a high‑performance 8‑bit RISC device designed for applications such as washing‑machine controllers and other home appliances. It features 19 bidirectional I/O lines, an on‑chip crystal/RC oscillator, a watchdog timer, and a programmable timer/event counter with a 7‑stage prescaler. The device also includes an 8‑channel 9‑bit A/D converter and a PWM output that shares pins with I/O lines.
The MCU provides 2048 × 14‑bit program memory ROM and 64 × 8‑bit data RAM. It is supplied in a 24‑pin SKDIP/SOP package and operates from 2.2 V to 5.5 V (4 MHz) or 4.5 V to 5.5 V (8 MHz). Detailed electrical characteristics, pin assignments, and functional descriptions are provided in the following sections.
| Operating voltage (4 MHz) | 2.2 V – 5.5 V |
|---|---|
| Operating voltage (8 MHz) | 4.5 V – 5.5 V |
| Bidirectional I/O lines | 19 |
| Program memory ROM | 2048 × 14 bits |
| Data memory RAM | 64 × 8 bits |
| PWM output | 1‑channel (6+2)/(7+1)-bit, shared with I/O |
| Package | 24‑pin SKDIP/SOP |
| Watchdog timer | Included |
| On‑chip oscillator | Crystal and RC oscillator |
The device operates from 2.2 V to 5.5 V at 4 MHz and from 4.5 V to 5.5 V at 8 MHz.
It provides 19 bidirectional I/O lines.
It is supplied in a 24‑pin SKDIP/SOP package.