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TH7121 Datasheet, PDF (12/28 Pages) List of Unclassifed Manufacturers – 300 to 930MHz FSK/FM/ASK Transceiver | |||
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TH7121
300 to 930MHz
FSK/FM/ASK Transceiver
Register Settings
A-word
Symbol
Bits No.
Description
Software button
RR9:RR0
RR9:RR0
[9:0] 10
Reference divider ratio in RX mode
TE:RE
[11:10] 2
Select active mode at programmable-channel application:
â00â
Standby mode
OPMODE
â11â
Idle mode
â10â
Transmit mode
PRELIMINARY LNAG
LNAGAIN
MIXG
MIXGAIN
Pow1:Pow0
TXPOWER
PA_AUTO
[12]
1
[13]
1
[15:14] 2
[16]
1
â01â
Receive mode
Select LNA gain at internal gain control:
â0â
low LNA gain
â1â
high LNA gain
Select mixer conversion gain at programmable-channel application:
â0â
low gain
â1â
high gain
Select output power at programmable-channel application:
â00â
Pmax - 20 dBm
â01â
Pmax - 12 dBm
â10â
Pmax - 6 dBm
â11â
Pmax
Disable automatic PA turn-on after PLL lock:
â0â
enabled
PA_AUTO
â1â
disabled
LOCK_MODE [17]
1
Select PFD output analyse mode of lock detecting:
LOCK_MODE
â0â
before lock only
â1â
before and after lock.
HighCur
[18]
1
Select Charge Pump output current:
CPCUR
â0â
± 260 µA
â1â
±1300 µA
MODUL
[19]
1
Select modulation mode at internal modulation control:
ASK/FSK
â0â
ASK
â1â
FSK
DI_MODE
[20]
1
Select mode for input data:
â0â
normal
DI_MODE
â0â for space at ASK or fmin at FSK, â1â for mark at ASK or fmax at FSK
â1â
inverse
not used
â1â for space at ASK or fmin at FSK, â0â for mark at ASK or fmax at FSK
[21]
1 âXâ
3901007121
Rev. 001
Page 12 of 28
Data Sheet
Jan. 2002
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