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ST72C254G1 数据表(PDF) 8 Page - STMicroelectronics |
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ST72C254G1 数据表(HTML) 8 Page - STMicroelectronics |
8 / 135 page ST72104G, ST72215G, ST72216G, ST72254G 8/135 PIN DESCRIPTION (Cont’d) For external pin connection guidelines, refer to Section 13 ”ELECTRICAL CHARACTERISTICS” on page 96. Legend / Abbreviations for Table 1: Type: I = input, O = output, S = supply Input level: A = Dedicated analog input In/Output level: C = CMOS 0.3VDD/0.7VDD, CT= CMOS 0.3VDD/0.7VDD with input trigger Output level: HS = 20mA high sink (on N-buffer only) Port and control configuration: – Input: float = floating, wpu = weak pull-up, int = interrupt 1), ana = analog – Output: OD = open drain 2), PP = push-pull Refer to Section 9 ”I/O PORTS” on page 30 for more details on the software configuration of the I/O ports. The RESET configuration of each pin is shown in bold. This configuration is valid as long as the device is in reset state. Table 1. Device Pin Description Pin n ° Pin Name Level Port / Control Main Function (after reset) Alternate Function Input Output 1 1 RESET I/O CT X X Top priority non maskable interrupt (active low) 2 2 OSC1 3) I External clock input or Resonator oscillator in- verter input or resistor input for RC oscillator 3 3 OSC2 3) O Resonator oscillator inverter output or capaci- tor input for RC oscillator 4 4 PB7/SS I/O CT X ei1 X X Port B7 SPI Slave Select (active low) 5 5 PB6/SCK/ISPCLK I/O CT X ei1 X X Port B6 SPI Serial Clock or ISP Clock 6 6 PB5/MISO /ISPDATA I/O CT X ei1 X X Port B5 SPI Master In/ Slave Out Data or ISP Data 7 7 PB4/MOSI I/O CT X ei1 X X Port B4 SPI Master Out / Slave In Data 8NC Not Connected 9NC 10 8 PB3/OCMP2_A I/O CT X ei1 X X Port B3 Timer A Output Compare 2 11 9 PB2/ICAP2_A I/O CT X ei1 X X Port B2 Timer A Input Capture 2 12 10 PB1 /OCMP1_A I/O CT X ei1 X X Port B1 Timer A Output Compare 1 13 11 PB0 /ICAP1_A I/O CT X ei1 X X Port B0 Timer A Input Capture 1 14 12 PC5/EXTCLK_A/AIN5 I/O CT X ei0/ei1 X X Port C5 Timer A Input Clock or ADC Analog Input 5 15 13 PC4/OCMP2_B/AIN4 I/O CT X ei0/ei1 X X Port C4 Timer B Output Compare 2 or ADC Analog Input 4 16 14 PC3/ ICAP2_B/AIN3 I/O CT X ei0/ei1 X X X Port C3 Timer B Input Capture 2 or ADC Analog Input 3 17 15 PC2/MCO/AIN2 I/O CT X ei0/ei1 X X X Port C2 Main clock output (fCPU)or ADC Analog Input 2 6 |
类似零件编号 - ST72C254G1 |
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类似说明 - ST72C254G1 |
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