SBAS603B Data sheet

SBAS603B April 2013 – November 2020 ADS4449

PRODUCTION DATA

Package Options

Mechanical Data (Package|Pins)

ZCR|144
- MPBGA77A

Thermal pad, mechanical data (Package|Pins)

Orderable Information

8.5.1.2 Serial Register Readout

The device includes a mode where the contents of the internal registers can be read back, as shown in Figure 8-9. This readback mode can be useful as a diagnostic check to verify the serial interface communication between the external controller and ADC.

Set the READOUT register bit to 1. This setting disables any further writes to the registers except register address 00h.
Initiate a serial interface cycle specifying the address of the register (A[7:0]) whose content must be read.
The device outputs the contents (D[7:0]) of the selected register on the SDOUT terminal (terminal G10).
The external controller can latch the contents at the SCLK falling edge.
To enable register writes, reset the READOUT register bit to 0.

Note that the contents of register 00h cannot be read back because the register contains RESET and READOUT bits. When the READOUT bit is disabled, the SDOUT terminal is in a high-impedance state. If serial readout is not used, the SDOUT terminal must not be connected (must float).

Figure 8-9 Serial Readout Timing Diagram

SDOUT comes out at the SCLK rising edge with an approximate delay (t_{SD_DELAY}) of 8 ns, as shown in Figure 8-10.

Figure 8-10 Sdout Delay Timing