Texas Instruments TRF7970A Manual page 54

TRF7970A
SLOS743L – AUGUST 2011 – REVISED MARCH 2017
6.14.1.3 Initial RF Collision Avoidance (0x04)
See the TRF7970A
6.14.1.4 Response RF Collision Avoidance (0x05)
See the TRF7970A
6.14.1.5 Response RF Collision Avoidance (0x06, n = 0)
See the TRF7970A
6.14.1.6 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).
6.14.1.7 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.
6.14.1.8 Transmission Without CRC (0x10)
Same as Section 6.14.1.7
6.14.1.9 Delayed Transmission With CRC (0x13)
The transmission command must be sent first, followed by the transmission length bytes, and FIFO data.
The reader transmission is triggered by the TX timer.
54 Detailed Description
Table 6-21. Register Values After Sending Software
Initialization (0x03) (continued)
ADDRESS
0x0B Regulator and I/O control
0x0C IRQ status
0x0D Collision position and interrupt mask
0x0E Collision position
0x0F RSSI levels and oscillator status
0x10 Special function
0x11 Special function
0x12 RAM
0x13 RAM
0x14 Adjustable FIFO IRQ levels
0x15 Reserved
0x16 NFC low field detection level
0x18 NFC target detection level
0x19 NFC target protocol
0x1A Test
0x1B Test
0x1C FIFO status
(2) Default value may not always be 0x00. See the
details.
Errata.
Errata.
Errata.
with CRC excluded.
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REGISTER VALUE
0x00
TRF7970A Errata
Copyright © 2011–2017, Texas Instruments Incorporated
TRF7970A
0x87
0x00
0x3E
0x00
0x40
0x00
0x00
0x00
0x00
0x00
0x00
0x00
(2)
0x00
0x00
0x00
0x00
for
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