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L9963E データシート(PDF) 58 Page - STMicroelectronics |
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L9963E データシート(HTML) 58 Page - STMicroelectronics |
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58 / 184 page  Symbol Parameter Test conditions Min. Typ. Max. Unit GND_LOSS_THR GND loss analog threshold 100 300 450 mV 4.9 General purpose I/O: GPIOs L9963E provides 9 GPIOs which can be individually configured as digital I/Os or analog I/Os according to the following configuration: Table 46. GPIO port configuration GPIO port Digital Analog Std. GPIO SPI Wake up FAULT Absolute input 1 X X 2 X X 3 X X 4 X X 5 X X 6 X X 7 X X X 8 X X X 9 X X X Note: 'X' means the option is available. GPIO default configuration depends on the device operating mode: Table 47. GPIO default configuration GPIO Type SPIEN = 1 SPIEN = 0 GPIO1_FAULTH Read Only Digital Input(1) GPIO2_FAULTL Read Only Digital Output(1) GPIO3 Read/Write Analog Input GPIO4 Read/Write Analog Input GPIO5 Read/Write Analog Input GPIO6 Read/Write Analog Input GPIO7_WAKEUP Read/Write Digital Input GPIO8_SCK Read/Write conditioned Digital Input(1) Analog Input GPIO9_SDO Read/Write conditioned Digital Output(1) Analog Input 1. Configuration is locked and cannot be changed by MCU. 4.9.1 GPIO3-9: absolute analog inputs Seven GPIOs (from GPIO3 to GPIO9) can be used as analog inputs. They can be converted during the Voltage conversion routine. This configuration is usually implemented in order to monitor external Negative Temperature Coefficient (NTCs). Refer to Section 6.9 NTC analog front end for the application circuit. The buffered regulator output VTREF is used to bias up to 7 NTC probes. Depending on the measurement strategy selected via ratio_abs_x_sel bit, two decoding formulas apply: L9963E General purpose I/O: GPIOs DS13636 - Rev 12 page 58/184 |
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