P89LPC938FDH

8-bit microcontroller with accelerated two-clock 80C51 core 8 kB 3 V byte-erasable Flash with 10-bit A/D converter


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The P89LPC9381 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 P89LPC9381 in order to reduce component count, board space, and system cost.

Features and benefits

Principal features

  • 4 kB byte-erasable flash code memory organized into 1 kB sectors and 64 B pages. Single-byte erasing allows any byte(s) to be used as non-volatile data storage.
  • 256 B RAM data memory on-chip RAM.
  • 8-input multiplexed 10-bit ADC. 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.
  • 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 VDD operating range. I/O pins are 5 V tolerant (may be pulled up or driven to 5.5 V).
  • 28-pin TSSOP package 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 P89LPC9381 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.
All information on this product information page is subject to the subsequent disclaimers:
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Parametric search

Parametrics of this product

Type numberPackagefmax
(MHz)		FLASH
(kB)		RAM
(B)		@ EEPROM
(B)		I/O
pins		UART
I2C
SPI
ADC
Timers
PWM
package reference code@ temperature
range
@ VDD
[min](V)		@ VDD
[max]
(V)		@ product description
P89LPC938FDHSOT361-1
(TSSOP28)		18.08.0768.0512.026.01.01.01.08.03.02.0TSSOP28F2.43.68-bit microcontroller with accelerated two-clock 80C51 core 8 kB 3 V byte-erasable Flash with 10-bit A/D converter

Similar products

Products / Packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarking
P89LPC938FDHP89LPC938FDH,5299352 785 46529Volume productionSOT361-1
(TSSOP28) 		Standard Marking

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree conversion dateRHFIFR (FIT)MTBF (hours)MSLMSL LF
P89LPC938FDHP89LPC938FDH,529P89LPC938FDHAlways Pb-free2.842.5839793281653747E822
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Documentation for this product

TypeFormatTitleDate
Data sheetpdf8-bit microcontroller with accelerated two-clock 80C51 core 8 kB 3 V byte-erasable Flash with 10-bit A/D converter (v.1.0)2005-02-25
Application notepdfAdding ISP firmware to an LPC900 software project (v.2.0)2009-04-21
Application notepdfPower management for the LPC900 family (v.1.0)2005-03-29
BrochurepdfLooking for more 32-bit MCU options? Start here. (v.1.0)2009-04-01
Errata sheetpdfLPC938 Erratasheet (v.1.0)2005-04-04
Other typezipAN10337 Adding ISP firmware to an LPC900 software project (v.2.0)2010-04-15
User manualpdfP89LPC938 User manual (v.3.0)2005-06-07

Ordering & availability

Type numberOrdering code(12NC)Orderable part numberRegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
P89LPC938FDH9352 785 46529P89LPC938FDH,529NADIGI-KEY CORPORATION7665/24/2012Buy onlinenot available
   NAMOUSER ELECTRONICS1655/24/2012Buy online 
   NAMOUSER ELECTRONICS1655/24/2012Buy online 
   EUFARNELL275/24/2012Buy online 
   NAARROW ELECTRONICS125/24/2012Buy online 
   JAPANCHIP ONE STOPyes05/14/2012Buy online 

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