This document is a specification sheet for HT48R54A, which describes the features and characteristics of this microcontroller, including the operating voltage range, memory capacity, number of input/output ports, LED driver outputs and input/output ports, etc.
This manual describes the HT48R54A 8‑bit microcontroller, its features, and how to use it in embedded designs. It includes details on operating modes, power‑saving functions, watchdog timer, and interrupt handling.
The document contains sections on pin descriptions, electrical parameters, test conditions, package dimensions, and programming resources such as the program memory layout and lookup tables. It is intended for engineers who need to integrate the HT48R54A into their products. This manual is written in Japanese.
| Operating voltage | 2.2 V–5.5 V (32768 Hz/4 MHz), 3.3 V–5.5 V (8 MHz) |
|---|---|
| Program memory | 4 KB (4096 × 15‑bit) ROM |
| Data memory | 192 bytes (192 × 8‑bit) RAM |
| I/O ports | 8 bidirectional I/O ports |
| External interrupts | 1 external interrupt input |
| Internal interrupts | 2 internal interrupts |
| Timers/Counters | Two 8‑bit timers/counters |
| Package options | 44‑pin QFP and 44‑pin LQFP |
| Power consumption | < 500 mW |
| Operating temperature | -40 °C to 85 °C |
| Supply voltage range (Vss) | -0.3 V to +6.0 V |
The device operates from 2.2 V to 5.5 V at 32768 Hz or 4 MHz, and from 3.3 V to 5.5 V at 8 MHz.
It provides eight bidirectional I/O ports.
The microcontroller is offered in 44‑pin QFP and 44‑pin LQFP packages.
Typical power consumption is less than 500 mW.