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SLOS732G – JUNE 2011 – REVISED MARCH 2020
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Detailed Description
Copyright © 2011–2020, Texas Instruments Incorporated
The MSB (bit 7) determines if the word is to be used as a command or as an address. The last two
columns of
list the function of the separate bits if either address or command is written. Data is
expected once the address word is sent. In continuous address mode (continuous mode = 1), the first
data that follows the address is written (or read) to (from) the given address. For each additional data, the
address is incremented by one. Continuous mode can be used to write to a block of control registers in a
single stream without changing the address; for example, setup of the predefined standard control
registers from the MCU nonvolatile memory to the reader. In noncontinuous address mode (simple
addressed mode), only one data word is expected after the address.
Address Mode is used to write or read the configuration registers or the FIFO. When writing more than
12 bytes to the FIFO, the Continuous Address Mode should be set to 1.
The Command Mode is used to enter a command that results in reader action (for example, initialize
transmission, enable reader, and turn reader on or off).
The following examples show the expected communications between an MCU and the TRF7960A.
