P89LPC938

General description

The P89LPC938 is a single-chip microcontroller, available in low cost packages, based on a high performance processor architecture that executes instructions in two to four clocks, six times the rate of standard 80C51 devices. Many system-level functions have been incorporated into the P89LPC938 in order to reduce component count, board space, and system cost.

Features

Principal features

• 8 kB byte-erasable Flash code memory organized into 1 kB sectors and 64-byte pages. Single-byte erasing allows any byte(s) to be used as non-volatile data storage.
• 256-byte RAM data memory and a 512-byte auxiliary on-chip RAM.
• 512-byte customer Data EEPROM on chip allows serialization of devices, storage of set-up parameters, etc.
• 8-input multiplexed 10-bit A/D converter. Two analog comparators with selectable inputs and reference source.
• Two 16-bit counter/timers (each may be configured to toggle a port output upon timer overflow or to become a PWM output) and a 23-bit system timer that can also be used as a RTC.
• Enhanced UART with fractional baud rate generator, break detect, framing error detection, and automatic address detection; 400 kHz byte-wide I²C-bus communication port and SPI communication port.
• CCU provides PWM, input capture, and output compare functions.
• High-accuracy internal RC oscillator option allows operation without external oscillator components. The RC oscillator option is selectable and fine tunable.
• 2.4 V to 3.6 V V_DD operating range. I/O pins are 5 V tolerant (may be pulled up or driven to 5.5 V).
• 28-pin TSSOP, PLCC, and HVQFN packages with 23 I/O pins minimum and up to 26 I/O pins while using on-chip oscillator and reset options.

Additional features

• A high performance 80C51 CPU provides instruction cycle times of 111 ns to 222 ns for all instructions except multiply and divide when executing at 18 MHz. This is six times the performance of the standard 80C51 running at the same clock frequency. A lower clock frequency for the same performance results in power savings and reduced EMI.
• Serial Flash ICP allows simple production coding with commercial EPROM programmers. Flash security bits prevent reading of sensitive application programs.
• Serial Flash ISP allows coding while the device is mounted in the end application.
• In-Application Programming of the Flash code memory. This allows changing the code in a running application.
• Watchdog timer with separate on-chip oscillator, requiring no external components. The watchdog prescaler is selectable from eight values.
• Low voltage reset (brownout detect) allows a graceful system shutdown when power fails. May optionally be configured as an interrupt.
• Idle and two different power-down reduced power modes. Improved wake-up from Power-down mode (a LOW interrupt input starts execution). Typical power-down current is 1 uA (total power-down with voltage comparators disabled).
• Active-LOW reset. On-chip power-on reset allows operation without external reset components. A reset counter and reset glitch suppression circuitry prevent spurious and incomplete resets. A software reset function is also available.
• Configurable on-chip oscillator with frequency range options selected by user programmed Flash configuration bits. Oscillator options support frequencies from 20 kHz to the maximum operating frequency of 18 MHz.
• Oscillator fail detect. The watchdog timer has a separate fully on-chip oscillator allowing it to perform an oscillator fail detect function.
• Programmable port output configuration options: quasi-bidirectional, open drain, push-pull, input-only.
• Port 'input pattern match' detect. Port 0 may generate an interrupt when the value of the pins match or do not match a programmable pattern.
• LED drive capability (20 mA) on all port pins. A maximum limit is specified for the entire chip.
• Controlled slew rate port outputs to reduce EMI. Outputs have approximately 10 ns minimum ramp times.
• Only power and ground connections are required to operate the P89LPC938 when internal reset option is selected.
• Four interrupt priority levels.
• Eight keypad interrupt inputs, plus two additional external interrupt inputs.
• Schmitt trigger port inputs.
• Second data pointer.
• Emulation support.

Products/packages

The variants in the table below are discontinued. See the table Discontinued information for more information.

Quality/reliability/chemical content

The variants in the table below are discontinued. See the table Discontinued information for more information.

Quality and reliability disclaimer

Pricing/ordering/availability

Discontinued information

Applications

Related applications
HID
Projector
Intelligent washing machine
Transceiver board
Power amplifier board
Main CPU board
LCD TV - MMS functionality
Color mixing for RGBA LEDs

Design support

Application Notes

AN10337; Adding ISP firmware to an LPC900 software project (2009-04-21)

AN10367; Power management for the LPC900 family (2005-03-29)

Support Documents

75015818; LFPAK power MOSFETs and LPC microcontrollers (2006-11-01)

ES_LPC938; LPC938 Erratasheet (2005-04-04)

75016725; Microcontroller Brochure - April 2009 (2009-04-04)

75016669; Microcontroller Line Card - April 2009 (2009-04-04)

UM10119; P89LPC938 User manual (2005-06-07)

Parametrics/similar products

Similar products
P89LPC938 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.

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Disclaimers

• General product disclaimer
• Quality and reliability disclaimer