EZZE SL900A, Техническое руководство

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M
ODEL
SL900A V
ERSION
V_1.0
P
REPARED BY
H/W D
ATE
2006.06.30
S
UBJECT
T
ECHNICAL
M
ANUAL
P
AGE
33/51
SL900A T
ECHNICAL
M
ANUAL
and downlink parts of Baseband Serial Ports. Baseband Serial Ports is a serial interface used to communicate
with DSP. In addition, there is a set of control registers in Baseband Front End that is intended for control of
Tx/Rx mixed-signal modules, inclusive of calibration of DC offset and gain mismatch of downlink analog-to-
digital conve
rters as well as uplink.
Figure 31. Block Diagram of Baseband Front-End
9.1 Baseband Serial Ports
Baseband Front End communicates with DSP through the sub block of Baseband Serial Ports. Baseband Serial
Ports interfaces with DSP in serial manner. It implies that DSP must be configured carefully in order to have
Baseband Serial Ports cooperate with DSP core correctly.
9.2 Downlink Path(RX Path)
On downlink path, the sub-block between RX mixed-signal module and Baseband Serial Ports is RX Path. It
mainly consists of a digital FIR filter, two sets of multiplexing paths for loopback modes, interface for RX
mixed-signal module and interface for Baseband Serial Ports.
Figure 32. Block Diagram of RX Path