Description

The P89LPC952FA is a single-chip microcontroller in a low-cost 8-pin package, based on a high-performance processor architecture that executes instructions at a faster rate compared to standard 80C51 devices. This microcontroller incorporates many system-level functions, reducing component count, board space, and system cost.

Specifications and features

Principal features:

• 1 kB byte-erasable Flash code memory organized into 256-byte sectors and 16-byte pages
• 128-byte RAM data memory
• Two 16-bit counter/timers (P89LPC901 Timer 0 may be configured to toggle a port output upon timer overflow or to become a PWM output)
• 23-bit system timer that can also be used as a Real-Time clock
• Two analog comparators (P89LPC902 and P89LPC903, single analog comparator on P89LPC901)
• Enhanced UART with fractional baudrate generator, break detect, framing error detection, automatic address detection, and versatile interrupt capabilities (P89LPC903)
• High-accuracy internal RC oscillator option allows operation without external oscillator components
• 2.4 V to 3.6 V VDD operating range with 5 V tolerant I/O pins (may be pulled up or driven to 5.5 V)
• Up to six I/O pins when using internal oscillator and reset options
• 8-pin SO-8 package

Additional features:

• A high-performance 80C51 CPU provides instruction cycle times of 167 ns to 333 ns for all instructions except multiply and divide when executing at 12 MHz, six times the performance of the standard 80C51 running at the same clock frequency
• In-Application Programming (IAP-Lite) and byte erase allow code memory to be used for non-volatile data storage
• Serial Flash In-Circuit Programming (ICP) allows simple production coding with commercial EPROM programmers. Flash security bits prevent reading of sensitive application programs
• Watchdog timer with separate on-chip oscillator, requiring no external components
• Low voltage reset (Brownout detect) allows a graceful system shutdown when power fails
• Idle and two different Power-down reduced power modes
• Active-LOW reset. On-chip power-on reset allows operation without external reset components
• Configurable on-chip oscillator with frequency range options selected by user-programmed Flash configuration bits, supporting frequencies from 20 kHz to the maximum operating frequency of 12 MHz
• Watchdog timer with separate on-chip oscillator, requiring no external components
• Programmable port output configuration options: quasi-bidirectional, open drain, push-pull, input-only
• Port ‘input pattern match’ detect
• LED drive capability (20 mA) on all port pins
• Controlled slew rate port outputs to reduce EMI
• Only power and ground connections are required to operate the P89LPC901/902/903 when internal reset option is selected
• Four interrupt priority levels
• Two (P89LPC901), three (P89LPC903), or five (P89LPC902) keypad interrupt inputs
• Second data pointer
• Schmitt trigger port inputs
• Emulation support

Application Scenarios

The P89LPC952FA microcontroller is suitable for various applications including but not limited to:

• Embedded systems
• Automotive electronics
• Home automation
• Industrial control
• Wireless communication

Comparison

- High-performance processor architecture with faster instruction execution

- Incorporates many system-level functions, reducing component count, board space, and system cost

- Wide operating voltage range and 5 V tolerant I/O pins

- Configurable on-chip oscillator with a range of frequency options

- In-Application Programming and Flash security bits for code memory

- Watchdog timer with on-chip oscillator and low voltage reset

- Various power modes for reduced power consumption

- Versatile interrupt capabilities and analog comparators

- Emulation support

- Limited number of I/O pins (up to six when using internal oscillator and reset options)