P87LPC759 is a 14-pin packaged microcontroller that is suitable for high integration and low-cost applications. It offers high-speed and low-speed crystal and RC oscillation modes with programmable selection. It has a wide operating voltage range, programmable I/O port output mode selection, LED drive output, and internal watchdog timer. P87LPC759 adopts an accelerated 80C51 processor architecture, with instruction execution speed twice that of the standard 80C51 CPU.
The manual provides an overview of the P87LPC759 14‑pin DIP microcontroller, highlighting its accelerated 80C51 core, programmable I/O, watchdog timer, and flexible clock options ranging from 10 MHz to 20 MHz. It details the device’s memory layout, including 1 KB OTP code space and 64 bytes of RAM, and explains the configurable I/O ports and interrupt structure.
Additional sections cover the oscillator selections (external crystal, ceramic, or internal RC), power‑down and idle modes with wake‑up capabilities, and electrical specifications such as operating voltage, current consumption, and pin drive strength. The document is intended for engineers designing with the P87LPC759. This manual is written in Chinese.
| Maximum clock frequency | 20 MHz (VDD 4.5‑6.0 V) / 10 MHz (VDD 2.7‑6.0 V) |
|---|---|
| OTP program memory | 1 KB |
| RAM | 64 bytes |
| I/O pins | 9 – 12 pins (depending on oscillator/reset configuration) |
| Package | 14‑pin DIP (PDIP) |
| Power consumption (power‑down) | ≈5 µA (3 V) |
The device can run up to 20 MHz when VDD is between 4.5 V and 6.0 V, and up to 10 MHz when VDD is between 2.7 V and 6.0 V.
Depending on the oscillator and reset configuration, the microcontroller offers between 9 and 12 usable I/O pins.
The P87LPC759 supports idle and power‑down (掉电) modes, both of which can be awakened by external interrupts or the watchdog timer.
The watchdog timer uses an internal oscillator and offers eight timeout selections; it can be enabled via the WDCON register and can also generate a reset on timeout.