CC11X1-Q1 Datasheet, PDF (51/94 Pages) Texas Instruments – Low-Power Sub-1-GHz Fractional-N UHF Device Family for Automotive

CC11x1-Q1
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SWRS076B – 11-07-22-013 - APRIL 2009 – REVISED APRIL 2010
Figure 3-20 shows the number of bytes in both the RX FIFO and TX FIFO when the threshold signal
toggles, in the case of FIFO_THR = 13. Figure 3-19 shows the signal as the respective FIFO is filled
above the threshold, and then drained below.
NUM_RXBYTES 53 54 55 56 57 56 55 54 53
GDO
NUM_TXBYTES 6 7 8 9 10 9 8 7 6
GDO
Figure 3-19. FIFO_THR = 13 vs Number of Bytes in FIFO
(GDOx_CFG = 0x00 in RX and GDOx_CFG = 0x02 in TX)
Table 3-15. FIFO_THR Settings and the Corresponding
FIFO Thresholds
FIFO_THR
0 (0000)
1 (0001)
2 (0010)
3 (0011)
4 (0100)
5 (0101)
6 (0110)
7 (0111)
8 (1000)
9 (1001)
10 (1010)
11 (1011)
12 (1100)
13 (1101)
14 (1110)
15 (1111)
BYTES IN TX FIFO
61
57
53
49
45
41
37
33
29
25
21
17
13
9
5
1
BYTES IN RX FIFO
4
8
12
16
20
24
28
32
36
40
44
48
52
56
60
64
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