P89LPC904 데이터 시트보기 (PDF) - Philips Electronics
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P89LPC904 Datasheet PDF : 41 Pages
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Philips Semiconductors
P89LPC904
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.
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