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T87C5112-S3FEV Datasheet(PDF) 5 Page - ATMEL Corporation |
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T87C5112-S3FEV Datasheet(HTML) 5 Page - ATMEL Corporation |
5 / 97 page Rev. B - November 10, 2000 5 Preliminary T80C5112 MNEMONIC PIN NUMBER TYPE NAME AND FUNCTION LQFP 48 PLCC 52 VSS XX I Ground: 0V reference. VCC XX I Power Supply: This is the power supply voltage for normal, idle and power- down operation. AVSS XI Analog Ground: 0V reference. AVCC I Analog Power Supply: This is the power supply voltage for normal and idle operation of the A/D VREF X X I VREF : A/D converter positive reference input. VPP X X I Vpp : Programming Supply Voltage: This pin also receives the 12V programming pulse which will start the EPROM programming and the manufacturer test modes. P1.0-P1.7 X X I/O Port 1: Port 1 is an 8-bit bidirectional I/O port with internal pull-ups. Port 1 pins that have 1s written to them are pulled high by the internal pull-ups and can be used as inputs. Alternate functions for Port 1 include: I/O WR (P1.0): External data memory write strobe I/O RD (P1.1): External data memory readstrobe I/O ECI (P1.2): External Clock for the PCA I/O CEX0 (P1.3): Capture/Compare External I/O for PCA module 0 I/O CEX1 (P1.4): Capture/Compare External I/O for PCA module 1 I/O CEX2 (P1.5): Capture/Compare External I/O for PCA module 2 I/O CEX3 (P1.6): Capture/Compare External I/O for PCA module 3 I/O CEX4 (P1.7): Capture/Compare External I/O for PCA module 4 P3.0-P3.7 XX I/O Port 3: Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. Port 3 pins that have 1s written to them are pulled high by the internal pull-ups and can be used as inputs. P3.4 and P3.5 are valid I/O pins only when the T80C5112 is using the internal RC oscillator, OSCB. P3.6 is an input only pin Port 3 also serves the special features of the 80C51 family, as listed below. I/O RXD (P3.0): Serial input port I/O TXD (P3.1): Serial output port I/O INT0 (P3.2): External interrupt 0 I/O T0 (P3.3): Timer 0 external input I/O XTAL1 (P3.4): Input to the inverting oscillator amplifier and input to the internal clock generator circuits, selected by hardware set upa I/O XTAL2 (P3.5): Output from the inverting oscillator amplifier, selected by hardware set up P4.0-P4.7 X X I/O Port 4: Port 4 is an 8-bit bidirectional I/O port. Each bit can be set as pure CMOS input or as push-pull output. Port 4 is also the input port of the Analog to digital converter and used for oscillator and reset. I/O AIN0 (P4.0): A/D converter input 0 I/O AIN1 (P4.1): A/D converter input 1 T1: Timer 1 external input I/O AIN2 (P4.2): A/D converter input 2 SS: Slave select input of the SPI controller |
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