CC2550 Datasheet, PDF (36/50 Pages) Texas Instruments – Single Chip Low Cost Low Power RF-Transmitter

CC2550
33.1 Configuration Register Details
Bit Field Name
7 GDO_DS
6 _{GDO1_INV}
5:0 _{GDO1_CFG[5:0]}
0x01: IOCFG1 – GDO1 output pin configuration
Reset
R/W Description
0
R/W Set high (1) or low (0) output drive strength on the
GDO pins.
0
R/W Invert output, i.e. select active low (1) / high (0)
46 (0x2E) R/W Default is 3-state (see Table 23 on page 31)
0x02: IOCFG0 – GDO0 output pin configuration
Bit Field Name
Reset
R/W Description
7 TEMP_SENSOR_ENABLE
6 _{GDO0_INV}
5:0 _{GDO0_CFG[5:0]}
0
R/W Enable analog temperature sensor. Write 0 in all
other register bits when using temperature sensor.
0
R/W Invert output, i.e. select active low (1) / high (0)
63 (0x3F) R/W Default is CLK_XOSC/192 (see Table 23 on page
31). Should be set to 3-state for lowest power down
current.
Bit Field Name
7:4 Reserved
3:0 FIFO_THR[3:0]
0x03: FIFOTHR – FIFO threshold
Reset R/W Description
0 (0000) R/W Write 0 (0000) for compatibility with possible future
extensions.
7 (0111) R/W Set the threshold for the TX FIFO. The threshold is
exceeded when the number of bytes in the FIFO is equal to
or higher than the threshold value.
Setting Bytes in TX FIFO
0 (0000)
61
1 (0001)
57
2 (0010)
53
3 (0011)
49
4 (0100)
45
5 (0101)
41
6 (0110)
37
7 (0111)
33
8 (1000)
29
9 (1001)
25
10 (1010)
21
11 (1011)
17
12 (1100)
13
13 (1101)
9
14 (1110)
5
15 (1111)
1
Preliminary Data Sheet (rev. 1.1) SWRS039
Page 36 of 51