Direct Commands From Mcu To Reader - Texas Instruments TRF7963A Manual

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6.13 Direct Commands from MCU to Reader

6.13.1 Command Codes
Table 6-11 lists the valid commands that the MCU can send to the reader.
COMMAND
CODE
0x00
0x03
0x0F
0x10
0x11
0x16
0x17
0x18
0x19
0x1A
The command code values from
significant bit (MSB) in
BIT
B7
B6
B5
B4
B3
B2
B1
B0
The MSB determines if the word is to be used as a command or address. The last two columns of
Table 6-12 show the function of separate bits depending on whether address or command is written.
Command mode is used to enter a command resulting in reader action (for example, initialize
transmission, enable reader, or turn the reader on or off).
6.13.2 Reset FIFO (0x0F)
The reset command clears the FIFO contents and FIFO Status register (0x1C). It also clears the register
storing the collision error location (0x0E).
6.13.3 Transmission With CRC (0x11)
The transmission command must be sent first, followed by transmission length bytes, and FIFO data. The
reader starts transmitting after the first byte is loaded into the FIFO. The CRC byte is included in the
transmitted sequence.
Copyright © 2011–2020, Texas Instruments Incorporated
Table 6-11. Command Codes
COMMAND
Idle
Software Initialization
Reset FIFO
Transmission Without CRC
Transmission With CRC
Block Receiver
Enable Receiver
Test Internal RF
Test External RF
Receiver Gain Adjust
Table 6-11
Table 6-12 must be set to 1.
Table 6-12. Address/Command Word Bit Distribution
DESCRIPTION
Command control bit
Read/Write
Continuous address mode
Address/Command bit 4
Address/Command bit 3
Address/Command bit 2
Address/Command bit 1
Address/Command bit 0
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SLOS758G – DECEMBER 2011 – REVISED MARCH 2020
Same as power-on reset
RSSI at RX input with TX off
RSSI at RX input with TX off
are substituted in Table
BIT FUNCTION ADDRESS
0 = Address
0
1 = Command
0 = Write
R/W
1 = Read
Continuous
mode
Adr 4
Adr 3
Adr 2
Adr 1
Adr 0
TRF7963A
TRF7963A
COMMENTS
6-12, Bits 0 to 4. Also, the most
COMMAND
1
0
Not used
Cmd 4
Cmd 3
Cmd 2
Cmd 1
Cmd 0
Detailed Description 39