参数资料
型号: PBA31301/3S
厂商: INFINEON TECHNOLOGIES AG
元件分类: 通信及网络
英文描述: SPECIALTY TELECOM CIRCUIT, PBGA34
封装: 10.20 X 14 MM, 1.60 MM HEIGHT, SOBGA-34
文件页数: 2/12页
文件大小: 812K
代理商: PBA31301/3S
10
PBA 313 01
EN/LZT 146 65 R3B Ericsson Microelectronics AB, October 2001
3. The 13 MHz clock circuitry stabilises and is output to the
CLK_REF pin. POR is activated when four complete cycles
have been delivered to the baseband.
4. The baseband should now initiate the XO-trim register,
Control, Modulation and LPO registers. The XO-trim reg-
ister should be set to the stored calibration value from
the production calibration. The Control and Modulation
register should be set to the recommended values for
normal operation.
5. The LPO frequency must be adjusted to 3.2 kHz. This is
done by comparing LPO_CLK with a fraction of the system
clock frequency, SYS_CLK. The initial calibration of the
LPO can use a successive approximation algorithm that
adjusts the LPO register value from its mid value (256)
in finer and finer steps until satisfied accuracy has been
achieved. This compensates for oscillator frequency varia-
tions due to process variations of the resistors and capaci-
tors. Thereafter, calibration of the LPO only has to be done
due to temperature and voltage variations by increments or
decrements of the LPO register value.
6. The Bluetooth radio and the baseband is now initialized up
to the point that is normally called stand-by mode.
Baseband
ASIC
or
Baseband
functionality
(DSP)
ADDR
DATA
CTRL
Bluetooth Radio
PBA 313 01
Data
Interface
VCC
TX_DATA
RX_DATA
TX_ON
RX_ON
Serial
Interface
SI_CLK
SI_CMS
SI_CMI
SI_CDO
Input
Control
Output
Control
POR_EXT
PHD_OFF
SYNT_ON
PX_ON
SYS_CLK_REQ
TX_CLK
POR
LPO_CLK
SYS_CLK
VCC_VCO
ANT
GND
XO_P
XO_N
CRYSTAL
VCC_IO VCC
GND
RS232
Transceiver
VCC_IO
UART
Memory
CODEC
GND
PCM
VCC
RS232
VCC_IO
VCC
GND
Figure 11. Typical UART or PCM configuration.
7. To activate the radio and be ready for transmission/
receive, write the value 111110112 = 25110 to the VCO/
DAFC control register and the value 101111112 = 19110 to
the Enable register.
8. To enter sleep mode power down the crystal by resetting
SYS_CLK_REQ. Bit 2 in the control register must be set to
enable SYS_CLK_REQ.
Ground
Ground should be distributed with very low impedance as a
ground plane. Connect all GND connections to the ground
plane. It is critical to have a ground plane underneath the
Bluetooth radio in order to shield the VCO tank from any
electrical noise, see figure 12. The ground vias purpose is
to connect the local ground plane to the main ground layer.
Note: If a local ground plane cannot be directly placed under-
neath the radio, then no routing should be planned under-
neath the radio until a layer can be used as a local ground
plane. The Bluetooth radio will be self shielding and no addi-
tional shields should be necessary for normal operating con-
ditions.
相关PDF资料
PDF描述
PBA31301/3S SPECIALTY TELECOM CIRCUIT, CBGA34
PBL38773/1ML TELECOM-SLIC, PQCC32
PBL38773/1SO TELECOM-SLIC, PDSO28
PC-PVC-271K 1 ELEMENT, 270 uH, GENERAL PURPOSE INDUCTOR
PC-PVC-270K 1 ELEMENT, 27 uH, GENERAL PURPOSE INDUCTOR
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