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ADS1158EVM bảng dữ liệu(PDF) 6 Page - Texas Instruments |
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ADS1158EVM bảng dữ liệu(HTML) 6 Page - Texas Instruments |
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6 / 39 page  Digital Interface www.ti.com Many pins on J6 have weak pull-up resistors. These resistors provide default settings for many of the control pins. Many pins on J6 correspond directly to ADS1258 pins, as shown in Table 4. See the ADS1258 data sheet for complete details on these pins. Table 4. J6 —Serial Interface Pins PIN NUMBER PIN NAME SIGNAL NAME I/O TYPE PULL-UP FUNCTION Optional ADS1258 START pin J6.1 CNTL CNTL In None control; see text J6.2 GPIO0 PDWN In High ADS1258 power-down pin J6.3 CLKX SCLK In None ADS1258 SPI clock J6.4 DGND DGND In/Out None Digital ground J6.5 CLKR — — None Unused J6.6 GPIO1 RST In High ADS1258 reset pin Optional ADS1258 chip-select J6.7 FSX CS In Low control; see text Clock select: J6.8 GPIO2 CLKSEL In High 0 = internal / out, 1 = external J6.9 FSR — — None Unused J6.10 DGND DGND In/Out None Digital ground J6.11 DX DIN In None ADS1258 SPI data in Power-supply mode: J6.12 GPIO3 N/A In High 0 = bipolar, 1 = unipolar J6.13 DR DOUT Out None ADS1258 SPI data out J6.14 GPIO4 — — None Unused J6.15 INT DRDY Out None ADS1258 data-ready output J6.16 SCL SCL I 2C N/A I 2C clock J6.17 TOUT CLK In None External clock input J6.18 DGND DGND In/Out None Digital ground J6.19 GPIO5 — — None Unused J6.20 SDA SDA I 2C N/A I 2C data 3.2 GPIO The GPIO connector, J3, carries the GPIO pins for the ADS1258. J3 is arranged so that GPIO0 and GPIO1 can be used to control START and CS, respectively; see Figure 2 and Figure 5. The PDK firmware controls START through GPIO0. CNTL(J6-1) and FSX(J6-7) are also brought to J3, so they can also be used to control START and CS. Both FSX and CNTL are pulled down, so these pins can be used to keep START and CS low if they are not to be used. Figure 2. J3 Pin Configuration 6 ADS1158EVM, ADS1258EVM, ADS1158EVM-PDK, and ADS1258EVM-PDK SBAU126C – May 2007 – Revised May 2011 Submit Documentation Feedback Copyright © 2007–2011, Texas Instruments Incorporated |
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