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1
1
0
0
0
1
0
Bit Sequence
1
FREND0.PA_POWER = 3
FREND0.PA_POWER = 7
Time
PATABLE[0]
PATABLE[1]
PATABLE[2]
PATABLE[3]
PATABLE[4]
PATABLE[5]
PATABLE[6]
PATABLE[7]
Output Power
SWRS037B – JANUARY 2006 – REVISED MARCH 2015
Table 5-8. Optimum PATABLE Settings for Various Output Power Levels and Frequency Bands
315 MHz
433 MHz
868 MHz
915 MHz
OUTPUT
CURRENT
CURRENT
CURRENT
CURRENT
POWER
SETTING
CONSUMPTION,
SETTING
CONSUMPTION,
SETTING
CONSUMPTION,
SETTING
CONSUMPTION,
[dBm]
TYP. [mA]
TYP. [mA]
TYP. [mA]
TYP. [mA]
–30
0x12
9.9
0x03
10.8
0x03
11.2
0x03
11.1
–20
0x0E
10.4
0x0E
11.4
0x0C
11.7
0x0F
11.7
–10
0x26
12.5
0x26
13.3
0x26
13.7
0x34
13.6
–5
0x57
12.2
0x57
12.9
0x57
13.3
0x56
13.3
0
0x60
14.1
0x60
14.6
0x60
15.5
0x50
15.2
3
0x8B
15.8
0x8A
16.5
0x8A
17.4
0x89
17.4
7
0xCC
21.4
0xC8
23
0xCC
24.4
0xC8
24.6
10
0xC4
25.6
0xC2
26.1
0xC3
29.3
0xC0
29.3
Table 5-9. Output Power and Current Consumption for Default PATABLE Setting
315 MHz
433 MHz
868 MHz
915 MHz
DEFAULT
OUTPUT
CURRENT
OUTPUT
CURRENT
OUTPUT
CURRENT
OUTPUT
CURRENT
POWER
POWER
CONSUMPTION,
POWER
CONSUMPTION,
POWER
CONSUMPTION,
POWER
CONSUMPTION,
SETTING
[dBm]
TYP. [mA]
[dBm]
TYP. [mA]
[dBm]
TYP. [mA]
[dBm]
TYP. [mA]
0xC6
9.3
24.4
8.1
23.9
8.9
27.3
7.7
25.5
5.16.1 Shaping and PA Ramping
With ASK modulation, up to eight power settings are used for shaping. The modulator contains a counter
that counts up when transmitting a one and down when transmitting a zero. The counter counts at a rate
equal to 8 times the symbol rate. The counter saturates at FREND0.PA_POWER and 0 respectively. This
counter value is used as an index for a lookup in the power table. Thus, in order to utilize the whole table,
FREND0.PA_POWER should be 7 when ASK is active. The shaping of the ASK signal is dependent on
the configuration of the PATABLE.
shows some examples of ASK shaping.
NOTE
The OOK/ASK pulse shaping feature on the CC1150 is only supported for output power
levels below –1 dBm.
Figure 5-17. Shaping of ASK Signal
5.17 General Purpose and Test Output Control Pins
The two digital output pins GDO0 and GDO1 are general control pins. Their functions are programmed by
IOCFG0.GDO0_CFG and IOCFG1.GDO1_CFG respectively.
shows the different signals that
can be monitored on the GDO pins. These signals can be used as an interrupt to the MCU.
GDO1 is the same pin as the SO pin on the SPI interface, thus the output programmed on this pin will
only be valid when CSn is high. The default value for GDO1 is 3-stated, which is useful when the SPI
interface is shared with other devices.
Copyright © 2006–2015, Texas Instruments Incorporated
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