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The EM78P156EL is an 8‑bit microcontroller built with low‑power high‑speed CMOS technology. It features a one‑time‑programmable (OTP) ROM, multiple configuration registers, 48 × 8‑bit SRAM, two bidirectional I/O ports, a 5‑level stack, and an 8‑bit timer/counter with programmable interrupt sources.
The document lists pin assignments for DIP‑18, SOP‑18, and SSOP‑20 packages, electrical characteristics such as supply voltage, current consumption, and temperature range, and includes functional block diagrams and register descriptions. This manual is written in Chinese.
| Operating voltage range | 2.3 V ~ 5.5 V |
|---|---|
| Operating temperature range | 0 °C ~ 70 °C |
| Supply current (5 V, 4 MHz) | < 1.6 mA |
| Supply current (3 V, 32 kHz) | ≈ 15 µA |
| Sleep mode current | ≈ 1 µA |
| Bidirectional I/O ports | 2 |
| On‑chip SRAM registers | 48 × 8 bits |
The device operates from 2.3 V up to 5.5 V.
It provides two bidirectional I/O ports.
Typical sleep‑mode current is about 1 µA.