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TRF7970A
www.ti.com
SLOS743K – AUGUST 2011 – REVISED APRIL 2014
6.14.3.2.3 TX Timer High Byte Control Register (0x04)
Table 6-31. TX Timer High Byte Control Register (0x04)
Function: For Timings
Default: 0xC2 at POR = H or EN = L, and at each write to ISO Control register
Bit
Name
Function
Description
B7
tm_st1
Timer Start Condition
tm_st1 = 0, tm_st0 = 0 →
beginning of TX SOF
tm_st1 = 0, tm_st0 = 1 →
end of TX SOF
B6
B5
B4
B3
B2
B1
B0
tm_st0
tm_lengthD
tm_lengthC
tm_lengthB
tm_lengthA
tm_length9
tm_length8
Timer Start Condition
Timer Length MSB
Timer Length
Timer Length
Timer Length
Timer Length
Timer Length LSB
tm_st1 = 1, tm_st0 = 0 →
tm_st1 = 1, tm_st0 = 1 →
beginning of RX SOF
end of RX SOF
6.14.3.2.4 TX Timer Low Byte Control Register (0x05)
Table 6-32. TX Timer Low Byte Control Register (0x05)
Function: For Timings
Default: 0x00 at POR = H or EN = L, and at each write to ISO Control register
Bit
B7
B6
B5
B4
B3
B2
B1
B0
Name
tm_length7
tm_length6
tm_length5
tm_length4
tm_length3
tm_length2
tm_length1
tm_length0
Function
Timer Length MSB
Timer Length
Timer Length
Timer Length
Timer Length
Timer Length
Timer Length
Timer Length LSB
Description
Defines the time when delayed transmission is started.
RX wait range is 590 ns to 9.76 ms (1 to 16383)
Step size is 590 ns
All bits low = timer disabled (0x00)
Preset 0x00 for all other protocols
Copyright ? 2011–2014, Texas Instruments Incorporated
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