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VSC060 bảng dữ liệu(PDF) 29 Page - Maxim Integrated Products |
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VSC060 bảng dữ liệu(HTML) 29 Page - Maxim Integrated Products |
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29 / 166 page  29 of 166 VSC060 Data Sheet Revision 4.1 January 2008 3.2.10 09h: General-Purpose I/O Port 9 Data (GPD9) The following table shows the bit assignments for the General-Purpose I/O Port 9 Data register. 3.2.11 0Ah: General-Purpose I/O Port 10 Data (GPD10) The following table shows the bit assignments for the General-Purpose I/O Port 10 Data register. Register Name: GPD9 Address: 09h Reset Value: XXXX_XXXXb Bit Bit Label Access Description 7:0 GPD9.7-0 R/W General-Purpose Data When the I/O pin is enabled as an output, writing these bits determines the data value that will be present on the corresponding I/O pin. If the I/O pin is enabled as an input, reading these register bits represents the current voltage applied to the pin. At no time do the bits directly represent the value latched into the data register. If a pin is enabled as an input and there is no signal applied, weak internal pull- up resistors hold the pin at a binary 1. After a reset or power on, the register bits are set to a binary 1, but the value returned from a register read is the level applied to the pin since each pin is an input by default. Register Name: GPD10 Address: 0Ah Reset Value: XXXX_XXXXb Bit Bit Label Access Description 7:0 GPD10.7-0 R/W General-Purpose Data When the I/O pin is enabled as an output, writing these bits determines the data value that will be present on the corresponding I/O pin. If the I/O pin is enabled as an input, reading these register bits represents the current voltage applied to the pin. At no time do the bits directly represent the value latched into the data register. If a pin is enabled as an input and there is no signal applied, weak internal pull- up resistors hold the pin at a binary 1. After a reset or power on, the register bits are set to a binary 1, but the value returned from a register read is the level applied to the pin since each pin is an input by default. |
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