參數(shù)資料
型號(hào)： T2901
廠商： Atmel Corp.
英文描述： Bluetooth Single-Chip Transceiver IC(用于2.45 GHz ISM帶寬藍(lán)牙技術(shù)收發(fā)器芯片)
中文描述： 藍(lán)牙單芯片收發(fā)器集成電路（用于2.45 GHz的ISM帶寬藍(lán)牙技術(shù)收發(fā)器芯片）
文件頁(yè)數(shù)： 9/17頁(yè)
文件大?。?/td> 556K
代理商： T2901
T2901
Rev. A2, 07-Jun-00
9 (17)
PLL Principle
RF_IN
Programable counter PC
”–
Main counter MC
”–
Swallow counter SC
f
VCO
= f
PD
x (S
MC
x 32 + S
SC
)
f
PD
Phase frequency
detector PD
CP
Divider by 2
TX: 2400
–
2500 MHz
VCO
DAC
f
PD
= 1,00 MHz
GF_DATA
Controlled phase shifting
Modulation MCC
compensation
Gaussian
filter GF
Reference counter RC
13,00 MHz
REF_CLK
S
RC
13,00 MHz
13
1,000 Mbit/s
PLL reference
Frequency
REF_CLK
TX_DATA
Baseband controller
Divider by 2
RX: 2289
–
2389 MHz
Figure 3. PLL principle
Table 1. The following table shows the maximum programmable LO frequencies for RX and TX.
f
IF
[MHz]
f
RX
[MHz]
min
111.0
max
111.0
f
TX
[MHz]
2048.0
2559.0
S
MC
64
79
S
SC
0
31
2159.0
2670.0
Preset of MCC and
Gaussian Transmit Filter for TX
After programming the PLL (3-wire bus Enable input
going to high level) until start of the Data preamble, it is
necessary to send a symmetrical alternating 1/0-datas-
tream.
Serial Programming Bus
Reference
programmed by the 3-wire bus (CLOCK, DATA and
ENABLE). In addition to this information, further control
bits such as the scaling of charge pump currents as well
as internal currents for the Gaussian lowpass filter and
modulation-compensation circuit can be transferred.
and
programmable
counters
can be
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