There are two methods to reset the ADS131A0x: pull the RESET pin low for at least tw(RSL) or send the RESET command. The RESET pin must be tied high if the RESET command is used. The RESET command takes effect at the completion of the command (see the RESET: Reset to POR Values section for more information). As part of the reset process, all registers are initialized to the default states, the status of the M0, M1, and M2 pins are latched, the interface is placed in a locked state, and the device enters standby mode. Reset can take up to 4.5 ms to complete. The device outputs a READY status word indicating that the reset is completed and the device is ready to accept commands. Send an UNLOCK command to enable the interface and begin communicating with the device. See Table 13 for more information on the READY status word, the UNLOCK from POR command, and the RESET command. Figure 7 illustrates the critical timing relationship of taking the ADS131A0x into reset and bringing the device out of reset.