This document introduces a new LED lighting device that uses new light-emitting materials and light-emitting devices. It has the advantages of high luminous efficiency, low power consumption, and long life.
The EM78P458 and EM78P459 are 8‑bit microcontrollers featuring a one‑time programmable (OTP) ROM of 4 K × 13 bits and 84 × 8 bit SRAM. The document describes the device’s operating conditions, pin functions, internal registers, and timing parameters, helping designers integrate the chip into low‑power, high‑speed applications.
Key sections include electrical specifications (voltage, temperature, current), package options, detailed pin‑out tables, register descriptions (R0‑R8), timer and watchdog operation, and programming instructions using an ELAN programmer. The final pages list package dimensions and part numbers for the available DIP and SOP variants. This manual is written in Chinese.
| Operating voltage range | 2.3 V – 5.5 V |
|---|---|
| Commercial operating temperature | 0 °C – 70 °C |
| Industrial operating temperature | -40 °C – 85 °C |
| Maximum clock frequency (DC mode) | 20 MHz @ 5 V, 8 MHz @ 3 V |
| Typical low‑power current (3 V, 32 kHz) | 15 nA |
| Sleep mode current | 1 µA (typical) |
| OTP ROM size | 4 K × 13 bits |
| SRAM size | 84 × 8 bits |
| Package options | 20‑pin DIP, 20‑pin SOP, 24‑pin skinny DIP, 24‑pin SOP |
The device operates from 2.3 V up to 5.5 V.
It is offered in 20‑pin DIP (EM78P458AP), 20‑pin SOP (EM78P458AM), 24‑pin skinny DIP (EM78P459AK) and 24‑pin SOP (EM78P459AM).
Typical low‑power current is 15 nA at 3 V with a 32 kHz clock.