T2802 ATMEL [ATMEL Corporation], T2802 Datasheet - Page 15

• Manufacturer Part Number: T2802
• Description: 2.4 GHz WDECT/ISM SINGLE-CHIP TRANSCEIVER
• Manufacturer: ATMEL [ATMEL Corporation]

The following table 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 1. LO Frequencies
Formula
TX:
RX: f
Control Signals
Table 2. Control Signals — Functions
4509F–DECT–10/03
Signal
I_CPSW
PU_REG
PU_VCO
PU_RX/TX
PU_PLL
RX_ON
TX_ON
Data Word 1 Bit D10
Data Word 1 Bit D9
Mode
RX
RX
TX
f
ANT
ANT
= f
= 1.728 MHz ´ (32 ´ S
(for 10.368 MHz/ 20.736 MHz
(for 13.824 MHz/ 27.648 MHz
VCO
REF_CLK recommended)
REF_CLK recommended)
= 1.728 MHz ´ (32 ´ S
110.592
112.320
f
IF
/MHz
Functions
Charge pump current control
Activates AUX voltage regulator supplying the complete transceiver
Activates VCO voltage regulator which supplies only the VCO
Activates RX/TX blocks
Activates PLL circuits: PC, PD, CP, RC
Activates RX circuits: BBF, DEMOD, IF AMP, IR MIXER
Activates TX circuits: TX-DRIVER, RAMP GEN, Starts RAMP SIGNAL at RAMP OUT
Activates GF in TX mode
Activates MCC in TX mode
MC
+ S
SC
MC
) + f
+ S
IF
Channel
SC
C45
C46
C45
C46
C45
C46
)
C0
C1
C0
C1
C0
C1
...
...
...
f
2401.920
2403.648
2479.680
2481.408
2401.920
2403.648
2479.680
2481.408
2401.920
2403.648
2479.680
2481.408
ANT
...
...
...
/MHz
f
2401.920
2403.648
2479.680
2498.688
2291.328
2293.056
2369.088
2370.816
2289.600
2291.328
2367.360
2369.088
VCO
...
...
...
/MHz
S
43
43
44
44
41
41
42
42
41
41
42
42
...
...
...
MC
T2802
S
14
15
27
28
14
15
27
28
13
14
26
27
...
...
...
SC
15