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ST52F510 데이터시트(PDF) 52 Page - STMicroelectronics |
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ST52F510 데이터시트(HTML) 52 Page - STMicroelectronics |
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52 / 106 page ![]() ST52F510/F513/F514 52/106 7.6.1 Configuration Registers. Port A Pull-Up Register (PORT_A_PULLUP) Configuration Register 24 (018h) Read/Write Reset Value: 0000 0000 (00h) Bit 7-0: PUA7-0 Port A pull-up (see Table 7.1) 0: Port A pin without pull-up 1: Port A pin with pull-up Port A Option Register (PORT_A_OR) Configuration Register 25 (019h) Read/Write Reset Value: 0000 0000 (00h) Bit 7-0: ORA7-0 Port A option (see Table 7.1) Port A Data Direction Register (PORT_A_DDR) Configuration Register 26 (01Ah) Read/Write Reset Value: 0000 0000 (00h) Bit 7-0: DDRA7-0 Port A direction (see Table 7.1) 0: Port A pin configured as input 1: Port A pin configured as output Port A Alternate Fuction (PORT_A_AF) Configuration Register 27 (01Bh) Read/Write Reset Value: 0000 0000 (00h) Bit 7: AFA7 Alternate Function PA7 0: Digital I/O 1: INT Bit 6: AFA6 Alternate Function PA6 0: Digital I/O 1: T0OUT Bit 5: AFA5 Alternate Function PA5 0: Digital I/O 1: TCLK Bit 4: AFA4 Alternate Function PA4 0: Digital I/O 1: TSTRT Bit 3: AFA3 Alternate Function PA3 0: Digital I/O 1: TRES Bit 2: AFA2 Alternate Function PA2 0: Digital I/O 1: T1OUT Bit 1: AFA1 Alternate Function PA1 0: Digital I/O 1: SDA Bit 0: AFA0 Alternate Function PA0 0: Digital I/O 1: SCL 70 PUA7 PUA6 PUA5 PUA4 PUA3 PUA2 PUA1 PUA0 70 ORA7 ORA6 ORA5 ORA4 ORA3 ORA2 ORA1 ORA0 70 DDRA7 DDRA6 DDRA5 DDRA4 DDRA3 DDRA2 DDRA1 DDRA0 70 AFA7 AFA6 AFA5 AFA4 AFA3 AFA2 AFA1 AFA0 Table 7.1 Pin mode configuration MODE PU OR DDR Input high impedance 0 0 0 Input with pull-up 1 0 0 Interrupt without pull-up 0 1 0 Interrupt with pull-up 1 1 0 Output push-pull 0 0 1 Output with pull-up 1 0 1 Output open drain 0 1 1 Output weak pull-up 1 1 1 |
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