RF31 Hope Microelectronics co., Ltd, RF31 Datasheet - Page 125

• Manufacturer Part Number: RF31
• Description: Rf31 Ism Receiver
• Manufacturer: Hope Microelectronics co., Ltd

Register 69h. AGC Override 1
Reset value = 00100000
Register 6Ah. AGC Override 2
Reset value = 10011101
Name
Name
Type
Type
Bit
Bit
7:5
2:0
5:2
1:0
Bit
Bit
4
3
7
6
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agcovpm
lnacomp[3:0]
R/W
D7
D7
pgath[1:0]
Reserved
agcovpm
pga[3:0]
agcslow
lnagain
Name
Name
agcen
Reserved
R
agcslow
D6
D6
R/W
Reserved.
Automatic Gain Control Enable.
When this bit is set then the result of the control can be read out from bits [4:0],
otherwise the gain can be controlled manually by writing into bits [4:0].
LNA Gain Select.
0 – min. gain = 5 dB
PGA Gain Override Value.
000:
001:
010:
...
101:
If set, AGC will ignore the Preamble Detection.
AGC Slow Gain Increase Enable.
When this bit is set then the AGC loop will slow down the gain increase in the
receiver.
The speed of the gain reduction is not affected.
LNA Gain Compensation.
This bit is used for smoothing RSSI value when LNA gain is switched.
Window Comparator Reference Voltage Adjust in the PGA.
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0 dB
3 dB
6 dB
24 dB max.
agcen
R/W
D5
D5
lnagain
R/W
D4
D4
lnacomp[3:0]
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1 – max. gain = 25 dB
R/W
Function
Function
D3
D3
D2
D2
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pga[3:0]
R/W
R F 3 1
D1
D1
pgath[1:0]
R/W
D0
D0
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