參數(shù)資料
型號： PCF5083
廠商： NXP Semiconductors N.V.
英文描述： STEEL COVER
中文描述： GSM信號處理IC
文件頁數(shù)： 50/136頁
文件大?。?/td> 602K
代理商： PCF5083
1996 Oct 29
50
Philips Semiconductors
Objective specification
GSM signal processing IC
PCF5083
9.1.5
T
ERMINAL ADAPTOR INTERFACE FOR DATA SERVICES
9.1.5.1
General description
In Fig.19 the block diagram of the data service architecture
using the PCF5083 is shown. The GSM terminal is
connected to an external terminal adaptor via the IOM
-2
interface (serial port Y) of the PCF5083. Channel coding in
accordance with “GSM recommendation 05.03”is done by
the DSP, rate adaptation and e.g. Hayes command
handling is done by the terminal adaptor.
There are two types of information that have to be
exchanged between the terminal adaptor and the GSM
terminal:
1.
User data that has to be transmitted via the air
interface. This is the input and output of the channel
codec in the PCF5083
2.
Control data which has to be exchanged between the
System Controller and the terminal adaptor.
Data transfer via the IOM
-2 is done in form of data
frames. Each data frame contains 160 16-bit samples
(20 ms) and consists of a user data block containing user
data to/from the channel codec and a control data block
containing control data to/from the System Controller. The
DSP firmware (the procedures MP_read_data_frame and
MP_write_data_frame, see Section 9.3.1) performs
multiplexing and demultiplexing of user and control data.
Control data is forwarded to the System Controller or to the
terminal adaptor, respectively without modification or
interpretation by the DSP.
A fully integrated solution for the architecture of GSM data
services is in preparation, at which rate adaptation is
realised as an additional DSP software module, Hayes
command interpretation is part of the P90CL301 software
and data communications are done via the RS-232 port of
the P90CL301.
Fig.19 Block diagram of the GSM Data Services with the PCF5083.
handbook, full pagewidth
MGE317
TERMINAL
ADAPTOR
MUX
DEMUX
CHANNEL
CODEC
PCF5083
GSM TERMINAL
P90CL301
PCF5083 DEVICE DRIVER
LAYER 1, 2, 3, MMI, . . .
control data
user data
IOM-2
user &
control data
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參數(shù)描述
PCF5083H/001/F2 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:GSM signal processing IC
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