Texas Instruments TRF7960 Manual page 29

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Defines the time after TX EOF when the RX input is disregarded
Register default is set to 0x1F at POR = H or EN = L and at each write to ISO control register.
Bit Bit Name Function
B7 Rxw7 RX wait
B6 Rxw6
B5 Rxw5
B4 Rxw4
B3 Rxw3
B2 Rxw2
B1 Rxw1
Controls the modulation depth, modulation input and ASK / OOK control
Register default is set to 0x11 at POR = H or EN = L, and at each write to ISO control register, except Clo1 and Clo0.
Bit Bit Name Function
B7 Unused
B6 en_ook_p 1 = enables external selection of ASK or OOK
modulation
B5 Clo1 SYS_CLK output frequency MSB
B4 Clo0 SYS_CLK output frequency LSB
B3 en_ana 1 = Enables analog output on ASK/OOK pin
(pin12)
B2 Pm2 Modulation depth MSB
B1 Pm1 Modulation depth
B0 Pm0 Modulation depth LSB
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Table 5-18. RX Wait Time (08h)
Comments
Defines the time during which the RX input is ignored.
It starts from the end of TX EOF.
RX wait range is 9.44 μs to 2407 μs (1...255),
Step size 9.44 μs
Preset: 293 μs ISO15693
Preset: 66 μs ISO14443A and B
Preset: 180 μs Tag-It
Table 5-19. Modulator and SYS_CLK Control (09h)
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SLOU186F – AUGUST 2006 – REVISED AUGUST 2010
Comments
Valid only when ISO control register (01) is configured to direct mode
Clo1 Clo0 CL_SYS Output state
0 0
0 1
1 0 6.78 MHz
1 1 13.56 MHz
For test and measurement
Pm2 Pm1 Pm0 Mod Type and %
0 0 0 ASK 10%
0 0 1 OOK (100%)
0 1 0 ASK 7%
0 1 1 ASK 8.5%
1 0 0 ASK 13%
1 0 1 ASK 16%
1 1 0 ASK 22%
1 1 1 ASK 30%
TRF7960
TRF7961
disabled
3.3 MHz
System Description 29