Key facts
- Brand
- Philips
- Model
- P89C51RD2
- Category
- Other Electronics
- Industry
- Electronics
- Documents
- 2
- Languages
- EN · ZH
- Last added
- 2012-07-03
Start here
PHILIPS P89C51RB2Hxx P89C51RC2Hxx P89C51RD2Hxx 80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM handbook
The Philips P89C51RB2/P89C51RC2/P89C51RD2Hxx is a single-chip 8-bit microcontroller manufactured in an advanced CMOS process. It is a derivative of the 80C51 family and features a non-volatile Flash program memory ranging from 16KB to 64KB, which supports both In-System Programming (ISP) and In-Application Programming (IAP). The device includes a Boot ROM containing low-level Flash programming routines, allowing for serial programming via the UART without external loaders.
Key features include four 8-bit I/O ports, three 16-bit timer/event counters, an enhanced UART with automatic address recognition, and a multi-source, four-priority-level nested interrupt structure. The microcontroller operates at speeds up to 20 MHz (6 clocks per machine cycle) or 33 MHz (12 clocks per machine cycle) and supports various power control modes, including Stop Clock, Idle, and Power-Down modes.
Philips P89C51RD2 specifications
| Program Memory | 16KB/32KB/64KB Flash |
|---|---|
| RAM | 512B/512B/1KB |
| Operating Temperature (0 to +70) | 0 to +70 °C |
| Operating Temperature (-40 to +85) | -40 to +85 °C |
| Max Frequency (6 clock mode) | 0 to 20 MHz |
| Max Frequency (12 clock mode) | 0 to 33 MHz |
| I/O Ports | Four 8-bit I/O ports |
| Timers | Three 16-bit timer/event counters |
| Interrupts | Seven interrupt sources |
| Interrupt Priority | Four interrupt priority levels |
| UART | Full-duplex enhanced UART |
All Philips P89C51RD2 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Instruction set, parameters and examples for configuring or programming the device.
Questions answered in these manuals
What is the difference between ISP and IAP?
In-System Programming (ISP) allows downloading new code while the microcontroller sits in the application, whereas In-Application Programming (IAP) means the microcontroller fetches new program code and reprograms itself while in the system.
Can the RAM be expanded externally?
Yes, the RAM is expandable externally to 64 kbytes.