Key facts
- Brand
- ZLG
- Model
- P89C51
- Category
- Other Electronics
- Documents
- 4
- Languages
- ZH
- Last added
- 2012-02-12
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ZLG P89C51RB2/RC2/RD2 Flash Program Storage User Manual
This manual provides an overview of the P89C51RB2/RC2/RD2 8‑bit microcontroller, its 16 KB/32 KB/64 KB parallel programmable flash, ISP and IAP programming methods, and the built‑in boot ROM that enables UART‑based code loading. It also details the device architecture, including the 80C51 core, instruction set compatibility, and the extended peripheral set.
The document covers pin descriptions, memory organization, timer/counter operation, PCA modules, UART features, power‑saving modes (idle, power‑down), and security (programmable lock bits). Ordering information, package options (PDIP, PLCC, LQFP) and electrical characteristics are also included. This manual is written in Chinese.
ZLG P89C51 specifications
| Flash memory size | 4 KB – 32 KB |
|---|---|
| RAM size | 128 B – 8 KB |
| Maximum operating frequency | 33 MHz |
| Operating voltage | 5 V (0 °C – 70 °C) |
| I/O ports | 4 × 8‑bit ports (P0‑P3) |
| UART type | Full‑duplex enhanced UART |
| Timers | 3 × 16‑bit timers |
| Package types | PLCC44, DIP40, LQFP44 |
All ZLG P89C51 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the maximum operating frequency?
The microcontroller can run up to 33 MHz.
What low‑power modes does the microcontroller support?
It supports an idle mode that freezes the CPU while keeping RAM, timers and UART active, and a power‑down mode that stops the oscillator and all internal functions, preserving RAM contents.
From: Guangzhou zhouli microcontroller P89C51X2 P89C52X2/54X2/58X2 Manual
How many I/O pins are available on the P89C51X2 series?
The series provides 32 I/O pins.
From: Guangzhou zhouli microcontroller P89C51X2 P89C52X2/54X2/58X2 Manual
How many I/O ports are available on the device?
The microcontroller provides four groups of 8‑bit I/O ports, for a total of 32 I/O pins.
From: ZLG P89C51RB2/RC2/RD2 Flash Program Storage User Manual
What power‑saving modes are provided?
It includes idle mode, power‑down mode, and a static stop mode where the clock can be halted to reduce power consumption.
From: ZLG P89C51RB2/RC2/RD2 Flash Program Storage User Manual