TH7121 Datasheet, PDF (13/28 Pages) List of Unclassifed Manufacturers – 300 to 930MHz FSK/FM/ASK Transceiver

TH7121
300 to 930MHz
FSK/FM/ASK Transceiver
B-word
Symbol
Bits No.
Description
Software button
RT9:RT0
RT9:RT0
[9:0] 10
Reference divider ratio in TX mode
Min2:Min0
[12:10] 3
Select minimum value of RO active current:
‘000’
0 µA
‘001’
50 µA
‘010’ 100 µA
PRELIMINARY ^ROMIN
Max2:Max0 [15:13] 3
ROMAX
‘011’
‘100’
‘101’
‘110’
‘111’
‘000’
‘001’
‘010’
‘011’
‘100’
‘101’
‘110’
‘111’
150 µA
200 µA
250 µA
300 µA
350 µA
Select maximum value of RO active current:
0 µA (RO is off)
50 µA
100 µA
150 µA
200 µA
250 µA
300 µA
350 µA
EnFm
[16]
1 Test bit. Forced '0' for correct functioning.
EnAdj
[17]
1 Test bit. Forced '0' for correct functioning.
LNAHYST
[18]
1
Enable LNA hysteresis:
LNAHYST
‘1’
disabled
‘0’
enabled
EnDelPLL
[19]
1
Enable delayed start of the PLL:
EnDelPLL
‘1’
disabled
‘0’
enabled.
not used
[20]
1 ‘X’
not used
[21]
1 ‘X’
3901007121
Rev. 001
Page 13 of 28
Data Sheet
Jan. 2002