T2803 View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
'T2803' PDF : 28 Pages View PDF
T2803
Table 3-1 shows the LO frequencies for RX and TX for the DECT band plus additional channels
for the extended DECT band. Intermediate frequencies of 110.592 MHz and 112.32 MHz are
supported.
Table 3-1. LO Frequencies
Mode
fIF/MHz
Channel
C0
C1
TX
–
...
C93
C94
C0
110.592
C1
RX
(for 10.368 MHz
REF_CLK
...
recommended)
C93
C94
C0
112.320
C1
RX
(for 13.824 MHz
REF_CLK
...
recommended)
C93
C94
fANT/MHz
2401.056
2401.920
...
2481.408
2482.272
2401.056
2401.920
...
2481.408
2482.272
2401.056
2401.920
...
2481.408
2482.272
Formula
TX:
RX:
fANT = fVCO = 864 kHz × (32 × SMC + SSC)
fANT = 864 kHz × (32 × SMC + SSC) + fIF
4. Control Signals
fVCO/MHz
2401.056
2401.920
...
2481.408
2482.272
2290.464
2291.328
...
2370.816
2371.680
2288.736
2289.600
...
2369.088
2369.952
SMC
SSC
N
86
27 2779
86
28 2780
...
...
...
89
24 2872
89
25 2873
82
27 2651
82
28 2652
...
...
...
85
24 2744
85
25 2745
82
25 2649
82
26 2650
...
...
...
85
22 2742
85
23 2743
Table 4-1. Control Signals – Functions
Signal
Functions
I_CPSW
Charge pump current control
PU_REG
Activates AUX voltage regulator supplying the complete transceiver
PU_RX/TX
Activates RX/TX blocks
PU_PLL
Activates PLL circuits: PC, PD, CP, RC, VCO
RX_ON
Activates RX circuits: BBF, DEMOD, IF AMP, IR MIXER
TX_ON
Activates TX circuits: TX-DRIVER, RAMP GEN, Starts RAMP SIGNAL at
RAMP OUT
OLE
Activates open loop mode of the PLL
Data Word 1, bit D0
Activates GF
15
4572I–DECT–07/05
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