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CAM35C44 датащи(PDF) 33 Page - SMSC Corporation |
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CAM35C44 датащи(HTML) 33 Page - SMSC Corporation |
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33 / 50 page ![]() 33 TABLE 30 - GPIO FUNCTIONAL DESCRIPTION GPx ENABLE 1 GPx OUT 2 GPIOx PIN DIRECTION I/O COMMAND GPx DATA 3 DESCRIPTION 1 1 OUTPUT READ CURRENT VALUE Output pin is active (driven), reads return last write. WRITE NEW VALUE Output pin is active (driven), writes update data register. 1 0 INPUT READ CURRENT VALUE Input pin is active, reads return the current state of the pin. WRITE NO EFFECT Input pin is active, writes have no effect. 0 1 INPUT READ LAST VALUE Output pin is floating, reads return last active state. WRITE NEW VALUE Output pin is floating, writes update data register. 0 0 INPUT READ LAST VALUE Input pin is disabled, reads return last enabled read state. WRITE NO EFFECT Input pin is disabled, writes have no effect. Note 1 This represents a GPIO Enable register bit. The GPIO Enable register is GP00 (see section GPIOA Enable Register on page 34). Note 2 This represents a GPIO Direction register bit. The GPIO Direction register is GP04 (see section GPIOA Direction Register on page 35). Note 3 This represents a GPIO Data register bit. The GPIO Data register is GP02 (see section GPIOA Data Register on page 35). |
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