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S87C654-7N40 Datasheet(PDF) 3 Page - NXP Semiconductors |
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S87C654-7N40 Datasheet(HTML) 3 Page - NXP Semiconductors |
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3 / 24 page  Philips Semiconductors Product specification 87C652/87C654 80C51 8-bit microcontroller 8K/16K, 256 OTP, I2C 1999 Jul 23 3 BLOCK DIAGRAM 64K BYTE BUS EXPANSION CONTRTOL PROG SERIAL PORT FULL DUPLEX UART SYNCHRONOUS SHIFT PROGRAMMABLE I/O CPU OSCILLATOR AND TIMING PROGRAM MEMORY DATA MEMORY (256 x 8 RAM) TWO 16-BIT TIMER/EVENT COUNTERS I2C SERIAL I/O SDA SCL SHARED WITH PORT 1 T0 T1 COUNTERS XTAL2 XTAL1 FREQUENCY REFERENCE INTERNAL INTERRUPTS INT0 INT1 EXTERNAL INTERRUPTS CONTROL PARALLEL PORTS, ADDRESS/DATA BUS AND I/O PINS SERIAL IN SERIAL OUT SHARED WITH PORT 3 (16K x 8 EPROM) SU00271 LOGIC SYMBOL VSS VCC RST XTAL1 XTAL2 VPP/EA PROG/ALE PSEN RxD TxD INT0 INT1 T0 T1 WR RD SCL SDA SU00262 |
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