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P80CL410HFP Datasheet(PDF) 8 Page - NXP Semiconductors |
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P80CL410HFP Datasheet(HTML) 8 Page - NXP Semiconductors |
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8 / 60 page  1997 Apr 10 8 Philips Semiconductors Product specification Low voltage 8-bit microcontrollers with I2C-bus P80CL410; P83CL410 7.2 Pin description Table 1 Pin description for DIP40 (SOT190-1), VSO40 (SOT319-2) and QFP44 (SOT307-2) packages For more extensive description of the port pins see Chapter 10 “I/O facilities”. SYMBOL PIN DESCRIPTION DIP40 VSO40 QFP44 P1.0/INT2 1 40 • Port 1: 8-bit bidirectional I/O port (P1.0 to P1.7). Port pins that have logic 1s written to them are pulled HIGH by internal pull-ups, and in this state can be used as inputs. As inputs, Port 1 pins that are externally pulled LOW will source current (IIL, see Chapter 20) due to the internal pull-ups. Port 1 output buffers can sink/source 4 LS TTL loads. • Alternative functions: – INT2 to INT9 are external interrupt inputs – SCL and SDA are the I2C-bus clock and data lines. P1.1/INT3 2 41 P1.2/INT4 3 42 P1.3/INT5 4 43 P1.4/INT6 5 44 P1.5/INT7 6 1 P1.6/INT8/SCL 7 2 P1.7/INT9/SDA 8 3 RST 9 4 Reset: a HIGH level on this pin for two machine cycles while the oscillator is running resets the device. P3.0 10 5 • Port 3: 8-bit bidirectional I/O port (P3.0 to P3.7). Same characteristics as Port 1. • Alternative functions: – INT0 and INT1 are external interrupts 0 and 1 – T0 and T1 are external inputs for timers 0 and 1 – WR is the external Data Memory write strobe – RD is the external Data Memory read strobe. P3.1 11 7 P3.2/INT0 12 8 P3.3/INT1 13 9 P3.4/T0 14 10 P3.5/T1 15 11 P3.6/WR 16 12 P3.7/RD 17 13 XTAL2 18 14 Crystal oscillator output: output of the inverting amplifier of the oscillator. Left open when external clock is used. XTAL1 19 15 Crystal oscillator input: input to the inverting amplifier of the oscillator, also the input for an externally generated clock source. VSS 20 16 Ground: circuit ground potential. P2.0 to P2.7 A8 to A15 21 to 28 18 to 25 • Port 2: 8-bit bidirectional I/O port (P2.0 to P2.7) with internal pull-ups. Same characteristics as Port 1. • High-order addressing: Port 2 emits the high-order address byte (A8 to A15) during accesses to external memory that use 16-bit addresses (MOVX @DPTR). In this application it uses the strong internal pull-ups when emitting logic 1s. During accesses to external memory that use 8-bit addresses (MOVX @Ri), Port 2 emits the contents of the P2 Special Function Register. PSEN 29 26 Program Store Enable. Output read strobe to external Program Memory. When executing code out of external Program Memory, PSEN is activated twice each machine cycle. However, during each access to external Data Memory two PSEN activations are skipped. |
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