P89LPC921FDH datasheet
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NXP Semiconductors
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8-bit microcontrollers with two-clock 80C51 core 2 kB/4 kB/8 kB 3 V low-power Flash with 256-byte data RAM - ADCs: 2 Analog Comp. ; Clock type: 2-clk ; External interrupt: 3 ; Function: 8-bit 80C51 uController ; I/O pins: 18 ; Memory size: 4K kBits; Memory type: FLASH ; Number of pins: 20 ; Operating frequency: 0~12 MHz; Operating temperature: -40~+85 Cel; Power supply: 2.4~3.6V ; Program security: yes ; PWMs: 2 ch 8-bit res. ; RAM: 256 bytes; Reset active: Low ; Serial interface: UART, I2C ; Series: LPC900 family ; Special features: Byte-eraseable Flash, pin-comp. w/ LPC76x, BOD, POR, Int. RC 7.373MHz +-2.5% ; System frequency: 0~12 MHz; Timers: 4 x 16-bit ; Watchdog timer: yes
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