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P89LPC904 Datasheet

8-bit microcontrollers

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P89LPC904
8-bit microcontrollers with two-clock accelerated 80C51 core
1 kB 3 V byte-erasable Flash with 8-bit A/D converter
Rev. 02 — 25 June 2004
Preliminary data
1. General description
The P89LPC904 is a single-chip microcontroller in a low-cost 8-pin package 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 P89LPC904 in order to reduce component count,
board space, and system cost.
2. Features
2.1 Principal features
s 1 kB byte-erasable Flash code memory organized into 256-byte sectors and
16-byte pages. Single-byte erasing allows any byte(s) to be used as non-volatile
data storage.
s 128-byte RAM data memory.
s Two 16-bit counter/timers.
s 23-bit system timer that can also be used as a Real-Time clock.
s 2 -input multiplexed A/D converter/single DAC output. Two analog comparators
with selectable reference.
s Enhanced UART with fractional baud rate generator, break detect, framing error
detection, automatic address detection and versatile interrupt capabilities.
s High-accuracy internal RC oscillator option allows operation without external
oscillator components. The RC oscillator option is selectable and fine tunable.
s 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). Industry-standard pinout with VDD, VSS, and reset at locations 1,
8, and 4.
s Up to six I/O pins when using internal oscillator and reset options.
s 8-pin SO-8 package.
2.2 Additional features
s 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.
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.
s In-Application Programming (IAP-Lite) and byte erase allows code memory to be
used for non-volatile data storage.


NXP Semiconductors Electronic Components Datasheet

P89LPC904 Datasheet

8-bit microcontrollers

No Preview Available !

Philips Semiconductors
P89LPC904www.DataSheet4U.com
8-bit microcontrollers with two-clock accelerated 80C51 core
s Serial Flash In-Circuit Programming (ICP) allows simple production coding with
commercial EPROM programmers. Flash security bits prevent reading of sensitive
application programs.
s Watchdog timer with separate on-chip oscillator, requiring no external
components. The Watchdog prescaler is selectable from 8 values.
s Low voltage reset (Brownout detect) allows a graceful system shutdown when
power fails. May optionally be configured as an interrupt.
s 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 µA (total Power-down with voltage comparators disabled).
s 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.
s Programmable port output configuration options: quasi-bidirectional, open drain,
push-pull, input-only.
s 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.
s LED drive capability (20 mA) on all port pins. A maximum limit is specified for the
entire chip.
s Controlled slew rate port outputs to reduce EMI. Outputs have approximately
10 ns minimum ramp times.
s Only power and ground connections are required to operate the P89LPC904
when internal reset option is selected.
s Four interrupt priority levels.
s One keypad interrupt input.
s Second data pointer.
s External clock input.
s Schmitt trigger port inputs.
s Emulation support.
9397 750 13521
Preliminary data
Rev. 02 — 25 June 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
2 of 41


Part Number P89LPC904
Description 8-bit microcontrollers
Maker NXP Semiconductors
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P89LPC904 Datasheet PDF






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