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參數(shù)資料
| 型號(hào)： | TRF2432_07 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Dual-Band IQ/IF TRANSCEIVER WITH DUAL VCO SYNTHESIZERS |
| 中文描述： | 雙頻智商具有雙中頻VCO的合成器/ |
| 文件頁(yè)數(shù)： | 9/24頁(yè) |
| 文件大?。?/td> | 537K |
| 代理商： | TRF2432_07 |
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SERIAL REGISTERS
TRF2432
SLWS177B–APRIL 2005–REVISED NOVEMBER 2006
Data is written to the registers per the following format:
Table 2. Serial Interface Data Format
REGISTERS
ADDRESS
(MSB) 1st BIT IN
#
D15
1
GCX
LAST BIT IN (LSB)
D2
D1
0
1
D14
TX_H
P
S_INV
D13
REF_
S
REF_
M
MR5
FI5
MI5
DI2
FR5
D12
FN_IF
D11
X
D10
A/B
D9
PS1
D8
PS0
D7
1
D6
1
D5
0
D4
1
D3
1
D0
0
2
CP
GC4
GC3
GC2
GC1
GC0
1
1
0
1
1
1
1
1
3
4
5
6
7
P
X
X
MR6
FI6
MI6
DI3
FR6
MR4
FI4
MI4
DI1
FR4
MR3
FI3
MI3
DI0
FR3
MR2
FI2
MI2
SI2
FR2
MR1
FI1
MI1
SI1
FR1
MR0
FI0
MI0
SI0
FR0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
0
0
0
1
0
0
0
1
0
1
0
1
1
0
DI4
XO_L
P
DR4
8
DR3
DR2
DR1
DR0
SR2
SR1
SR0
1
1
0
1
1
1
1
0
Table 3. Serial Register Definitions
NAME
SYMBOL
# OF
BITS
2
DEFAULTS
(1)
DESCRIPTION
Power mode
PS
0
Determines mode of operation: Standby, Idle, or Active.
(see Table 17)
Selects TX and RX band. 1 = A band and 0 = B Band
Controls gain setting of TX if CGX=0 (see below). {11111}
is max gain and {00000} is minimum gain.
Sets both the TX I/Q modulator and RX I/Q demodulator
for spectral inversion. S_INV = 1 for spectral inversion.
S_INV = 0 for no inversion.
Sets the crystal or reference pre-scalar divider.
Registers used to program the RF synthesizer operation
frequency.
Band A or B select
TX gain control
A/B
GC
1
5
0
[x,x,x,x,x]
Spectral inversion
S_INV
1
1
Crystal pre-scalar
RF PLL frequency
P
1
5
3
7
7
5
3
7
7
1
1
DR
SR
FR
MR
DI
SI
FI
MI
GCX
[0,1,0,1,0] = 10
[0,0,0] = 0
[0,1,1,0,0,0,0]=48
[1,0,0,1,1,1,1]=79
X
X
X
X
1
IF PLL frequency
Registers used to program the IF synthesizer operation
frequency. These registers are only effective, when the IF
synthesizer is in fractional-N mode (i.e. FN_IF=1)
TX gain control MUX
GCX=0 switches the Tx gain control to the serial port.
GCX=1 switches the Tx gain control to the parallel input
pins.
FN_IF =1 enables the fractional N IF synthesizer FN = 0
sets the IF synthesizer to a fixed frequency
Always set REF_S = 0
Always set REF_M = 0
CP = 1 puts charge pump for reference and fixed
synthesizers into continuous current mode. CP = 0 puts
synthesizers into current saving mode.
XO_LP =1 puts crystal oscillator in low power mode.
XO_LP = 0 puts the crystal oscillator full-power mode for
better noise performance, and start-up time.
Fractional N IF synthesizer
FN_IF
1
0
REF_S
REF_M
Charge Pump Current
Setting
REF_S
REF_M
CP
1
1
1
0
0
0
XO low power mode
XO_LP
1
1
(1)
Default values are the initial values after power up or after PE goes HIGH. “x” indicates undefined.
9
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