TH7121 Datasheet, PDF (12/28 Pages) List of Unclassifed Manufacturers – 300 to 930MHz FSK/FM/ASK Transceiver

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:
‘00’
Standby mode
OPMODE
‘11’
Idle mode
‘10’
Transmit mode
PRELIMINARY ^LNAG
LNAGAIN
MIXG
MIXGAIN
Pow1:Pow0
TXPOWER
PA_AUTO
[12]
1
[13]
1
[15:14] 2
[16]
1
‘01’
Receive mode
Select LNA gain at internal gain control:
‘0’
low LNA gain
‘1’
high LNA gain
Select mixer conversion gain at programmable-channel application:
‘0’
low gain
‘1’
high gain
Select output power at programmable-channel application:
‘00’
P_max - 20 dBm
‘01’
P_max - 12 dBm
‘10’
P_max - 6 dBm
‘11’
P_max
Disable automatic PA turn-on after PLL lock:
‘0’
enabled
PA_AUTO
‘1’
disabled
LOCK_MODE [17]
1
Select PFD output analyse mode of lock detecting:
LOCK_MODE
‘0’
before lock only
‘1’
before and after lock.
HighCur
[18]
1
Select Charge Pump output current:
CPCUR
‘0’
± 260 µA
‘1’
±1300 µA
MODUL
[19]
1
Select modulation mode at internal modulation control:
ASK/FSK
‘0’
ASK
‘1’
FSK
DI_MODE
[20]
1
Select mode for input data:
‘0’
normal
DI_MODE
‘0’ for space at ASK or f_min at FSK, ‘1’ for mark at ASK or f_max at FSK
‘1’
inverse
not used
‘1’ for space at ASK or f_min at FSK, ‘0’ for mark at ASK or f_max at FSK
[21]
1 ‘X’
3901007121
Rev. 001
Page 12 of 28
Data Sheet
Jan. 2002