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TMS320F2811 数据表(PDF) 84 Page - Texas Instruments |
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TMS320F2811 数据表(HTML) 84 Page - Texas Instruments |
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84 / 173 page  Peripherals 84 April 2001 − Revised July 2007 SPRS174O 4.8 GPIO MUX The GPIO Mux registers, are used to select the operation of shared pins on the F281x and C281x devices. The pins can be individually selected to operate as “Digital I/O” or connected to “Peripheral I/O” signals (via the GPxMUX registers). If selected for “Digital I/O” mode, registers are provided to configure the pin direction (via the GPxDIR registers) and to qualify the input signal to remove unwanted noise (via the GPxQUAL) registers). Table 4−11 lists the GPIO Mux Registers. Table 4−11. GPIO Mux Registers†‡§ NAME ADDRESS SIZE (x16) REGISTER DESCRIPTION GPAMUX 0x00 70C0 1 GPIO A Mux Control Register GPADIR 0x00 70C1 1 GPIO A Direction Control Register GPAQUAL 0x00 70C2 1 GPIO A Input Qualification Control Register Reserved 0x00 70C3 1 GPBMUX 0x00 70C4 1 GPIO B Mux Control Register GPBDIR 0x00 70C5 1 GPIO B Direction Control Register GPBQUAL 0x00 70C6 1 GPIO B Input Qualification Control Register Reserved 0x00 70C7 1 Reserved 0x00 70C8 1 Reserved 0x00 70C9 1 Reserved 0x00 70CA 1 Reserved 0x00 70CB 1 GPDMUX 0x00 70CC 1 GPIO D Mux Control Register GPDDIR 0x00 70CD 1 GPIO D Direction Control Register GPDQUAL 0x00 70CE 1 GPIO D Input Qualification Control Register Reserved 0x00 70CF 1 GPEMUX 0x00 70D0 1 GPIO E Mux Control Register GPEDIR 0x00 70D1 1 GPIO E Direction Control Register GPEQUAL 0x00 70D2 1 GPIO E Input Qualification Control Register Reserved 0x00 70D3 1 GPFMUX 0x00 70D4 1 GPIO F Mux Control Register GPFDIR 0x00 70D5 1 GPIO F Direction Control Register Reserved 0x00 70D6 1 Reserved 0x00 70D7 1 GPGMUX 0x00 70D8 1 GPIO G Mux Control Register GPGDIR 0x00 70D9 1 GPIO G Direction Control Register Reserved 0x00 70DA 1 Reserved 0x00 70DB 1 Reserved 0x00 70DC 0x00 70DF 4 † Reserved locations return undefined values and writes are ignored. ‡ Not all inputs support input signal qualification. § These registers are EALLOW protected. This prevents spurious writes from overwriting the contents and corrupting the system. |
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