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ADS1147IPWR Datasheet(PDF) 39 Page - Texas Instruments |
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ADS1147IPWR Datasheet(HTML) 39 Page - Texas Instruments |
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39 / 50 page  ADS1146 ADS1147 ADS1148 www.ti.com SBAS453C – JULY 2009 – REVISED APRIL 2010 ADS1147 AND ADS1148 DETAILED REGISTER DEFINITIONS (continued) GPIOCFG—GPIO Configuration Register. The GPIO and analog pins are shared as follows: GPIO0 shared with REFP0 GPIO1 shared with REFN0 GPIO2 shared with AIN2 GPIO3 shared with AIN3 GPIO4 shared with AIN4 (ADS1148) GPIO5 shared with AIN5 (ADS1148) GPIO6 shared with AIN6 (ADS1148) GPIO7 shared with AIN7 (ADS1148) GPIOCFG - ADDRESS 0Ch RESET VALUE = 00h DEVICE BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 ADS1148 IOCFG7 IOCFG6 IOCFG5 IOCFG4 IOCFG3 IOCFG2 IOCFG1 IOCFG0 ADS1147 0 0 0 0 IOCFG3 IOCFG2 IOCFG1 IOCFG0 Bits[7:0] IOCFG[7:0] These bits enable the GPIO because the GPIO pins are shared with the analog pins. Note that the ADS1148 uses all the IOCFG bits, whereas the ADS1147 uses only bits 3:0. 0 = The pin is used as an analog input (default) 1 = The pin is used as a GPIO pin GPIODIR—GPIO Direction Register GPIODIR - ADDRESS 0Dh RESET VALUE = 00h DEVICE BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 ADS1148 IODIR7 IODIR6 IODIR5 IODIR4 IODIR3 IODIR2 IODIR1 IODIR0 ADS1147 0 0 0 0 IODIR3 IODIR2 IODIR1 IODIR0 Bits[7:0] IODIR[7:0] These bits control the direction of the GPIO when enabled by the IOCFG bits. Note that the ADS1148 uses all the IODIR bits, whereas the ADS1147 uses only bits 3:0. 0 = The GPIO is an output (default) 1 = The GPIO is an input GPIODAT—GPIO Data Register GPIODAT - ADDRESS 0Eh RESET VALUE = 00h DEVICE BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 ADS1148 IODAT7 IODAT6 IODAT5 IODAT4 IODAT3 IODAT2 IODAT1 IODAT0 ADS1147 0 0 0 0 IODAT3 IODAT2 IODAT1 IODAT0 Bits[7:0] IODAT[7:0] If a GPIO pin is enabled in the GPIOCFG register and configured as an output in the GPIO Direction register (GPIODIR), the value written to this register appears on the appropriate GPIO pin. If a GPIO pin is configured as an input in GPIODIR, reading this register returns the value of the digital I/O pins. Note that the ADS1148 uses all eight IODAT bits, while the ADS1147 uses only bits 3:0. Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback 39 Product Folder Link(s): ADS1146 ADS1147 ADS1148 |
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