TDC7200_15 Datasheet, PDF (22/50 Pages) Texas Instruments – TDC7200 Time-to-Digital Converter for Time-of-Flight Applications in LIDAR,Magnetostrictive and Flow Meters

TDC7200
SNAS647C – FEBRUARY 2015 – REVISED AUGUST 2015
Programming (continued)
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Figure 21. SPI Protocol
8.5.1.1 CSB
CSB is an active-low signal and needs to be low throughout a transaction. That is, CSB should not pulse
between the command byte and the data byte of a single transaction.
De-asserting CSB always terminates an ongoing transaction, even if it is not yet complete. Re-asserting CSB will
always bring the device into a state ready for the next transaction, regardless of the termination status of a
previous transaction.
8.5.1.2 SCLK
SPI clock can idle high or low. It is recommended to keep SCLK as clean as possible to prevent glitches from
corrupting the SPI frame.
8.5.1.3 DIN
Data In (DIN) is driven by the SPI master by sending the command and the data byte to configure the TDC7200.
8.5.1.4 DOUT
Data Out (DOUT) is driven by the TDC7200 when the SPI master initiates a read transaction. When the
TDC7200 is not being read out, the DOUT pin is in high impedance mode and is undriven.
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