8.4.3 Device Power-Up Sequence

The device power-up sequence is shown in Figure 49. By default, the Mode Control Register is configured for manual mode and the default channel is channel 0. As explained previously, these devices offer Program Registers to configure user programmable features like GPIOs, Alarms, and to pre-program the channel sequence for Auto modes. At ‘power up or on reset’ these registers are set to the default values listed in Table 1 to Table 11. On power up or after reset It is required to program Mode Control Register and Program Register to required mode of operation. Once configured; the device is ready to use in any of the three channel sequencing modes namely Manual, Auto-1, and Auto-2.

1. The device continues its operation in manual mode channel 0 throughout the programming sequence and outputs valid conversion results. It is possible to change channel, range, GPIO by inserting extra frames in between two programming blocks. It is also possible to bypass any programming block if the user does not intend to use that feature.

2. It is possible to reprogram the device at any time during operation, regardless of what mode the device is in. During programming the device continues its operation in whatever mode it is in and outputs valid data.

Figure 49. Device Power-Up Sequence