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SIO1007 数据表(PDF) 48 Page - Microchip Technology |
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SIO1007 数据表(HTML) 48 Page - Microchip Technology |
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48 / 108 page  SIO1007 DS00002020A-page 48 2005 - 2015 Microchip Technology Inc. Note 14-2 The GPIO Data Registers are located at the offset shown from the RUNTIME REGISTERS BLOCK address. 14.3 GPIO Control Each GPIO port has an 8-bit control register that controls the behavior of the pin. These registers are defined in the Configuration section of this specification. Each GPIO port may be configured as either an input or an output. If the pin is configured as an output, it can be pro- grammed as open-drain or push-pull. Inputs and outputs can be configured as non-inverting or inverting. GPIO Direction Registers determine the port direction, GPIO Polarity Registers determine the signal polarity, and GPIO Output Type Register determines the output driver type select. The GPIO Output Type Register applies all GPIOs. The GPIO Direc- tion, Polarity and Output Type Registers control the GPIO pin when the pin is configured for the GPIO function and when the pin is configured for the alternate function for all pins. The basic GPIO configuration options are summarized in Table 14-3. In addition, each GPIO pin has a programmable weak pull-up (45 A) to VCC. The Pull-up control is independent of GPIO direction, buffer type, and Alternate Function selection. Each GPIO pin has a bit in a GPIO PULLUP Register, which enables the pin’s pull-up. TABLE 14-2: GENERAL PURPOSE I/O PORT ASSIGNMENTS Default Function Alternate Function Data Register Data Register Bit No. Register Offset (HEX) Pullup Control Register Control (Note 14-2) Pullup Register Bit No. GPIO10 GP1 0 0C CR38 0 GPIO11 1 1 GPIO12 IO_SMI# 2 2 GPIO13 IRQIN1 3 3 GPIO14 IRQIN2 4 4 GPIO15 5 5 GPIO16 6 6 GPIO17 7 7 GPIO 30 GP3 0 0E CR37 0 GPIO 31 1 1 GPIO 32 2 2 GPIO33 3 3 GPIO34 4 4 GPIO35 5 5 GPIO36 6 6 GPIO37 7 7 TABLE 14-3: GPIO CONFIGURATION SUMMARY Selected Function Direction Bit Polarity Bit Description B0 B1 GPIO 0 0 Pin is a non-inverted output. 0 1 Pin is an inverted output. 1 0 Pin is a non-inverted input. 1 1 Pin is an inverted input. |
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