Dalsi 8-pinovy jednocip
Daniel Valuch
daniel.valuch@wanadoo.fr
Úterý Srpen 10 15:35:15 CEST 2004
kolko tato hracka stoji? Vyzera to celkom zaujimavo...
http://www.semiconductors.philips.com/cgi-bin/pldb/pip/p89lpc904fd.html
Principal features
* 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.
* 128-byte RAM data memory.
* Two 16-bit counter/timers.
* 23-bit system timer that can also be used as a Real-Time clock.
* 2 -input multiplexed A/D converter/single DAC output. Two analog
comparators with selectable reference.
* Enhanced UART with fractional baud rate generator, break detect,
framing error detection, automatic address detection and versatile
interrupt capabilities.
* 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 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.
* 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. 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.
* In-Application Programming (IAP-Lite) and byte erase allows 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. The Watchdog prescaler is selectable from 8 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.
* 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
P89LPC904 when internal reset option is selected.
* Four interrupt priority levels.
* One keypad interrupt input.
* Second data pointer.
* External clock input.
* Schmitt trigger port inputs.
* Emulation support.
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