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ST75C520 Datasheet(PDF) 2 Page - STMicroelectronics

Part # ST75C520
Description  HIGH SPEED FAX MODEM DATA PUMP
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST75C520 Datasheet(HTML) 2 Page - STMicroelectronics

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CONTENTS
Page
I
PIN DESCRIPTION . .... ... .. . . . . ... ... ... .... ... ... ... ... ... .... . . . ...
3
I.1
PIN CONNECTIONS. . . . . . . . . . . . . . ... ... ... .... ... ... ... ... ... ... .... ...
3
I.2
HOST INTERFACE. . .... ... ... .. .... ... ... . . . . . . .... ... .. . . . . . . . . . . . . . .
3
I.3
ANALOG INTERFACE . . . . . . . . . . . . ... ... ... .... ... ... ... ... ... ... .... ...
4
I.4
V.24 INTERFACE . . . .... ... ... .. .... ... ... . . . . . . .... ... .. . . . . . . . . . . . . . .
4
I.5
MISCELLANOUS . . . .... ... ... .. .... ... .... .. . . . . . . . ... .. . . . . . . . . . . . . . .
4
I.6
BOUNDARY SCAN INTERFACE . . . . . . . . . . . . . .... ... ... ... ... ... ... .... ...
4
I.7
POWER SUPPLY . . . . . . . . . .... .. . . . . . . . . . . . ... .. . . . . . . . ... ... ... .... .. .
5
II
BLOCK DIAGRAMS. . . . .... ... .. . . . . . . . . . . . ... .. . . . . . . . ... ... ... .... .. .
5
III
ELECTRICAL SPECIFICATIONS .. .... .... . . . . . . . . . . . .... .. . . . . . . . ... . . . .
6
III.1
MAXIMUM RATINGS . . . . . . . . . . . . . ... ... ... .... ... ... ... ... ... ... .... ...
6
III.2
DC CHARACTERISTICS . . . . . . . . . .... ... ... . . . . . . .... ... .. . . . . . . . . . . . . . .
6
III.3
AC CHARACTERISTICS . . . . . . . . . .... ... ... . . . . . . .... ... .. . . . . . . . . . . . . . .
8
IV
FUNCTIONAL DESCRIPTION ... .. .... ... ... . . . . . . .... ... .. . . . . . . . . . . . . . .
10
IV.1
SYSTEM ARCHITECTURE . .... .. .... ... ... . . . . . . .... ... .. . . . . . . . . . . . . . .
10
IV.2
OPERATION. . . . .... .. . . . . . . . . . . ... ... ... .... ... ... ... ... ... ... .... ...
10
IV.3
MODEM INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... ... ... .... .. .
11
V.
USER INTERFACE. . . . . . . . . ... .. . . . . . . . . . . . ... .. . . . . . . . ... ... ... .... .. .
11
V.1
DUAL PORT RAM DESCRIPTION . . .... ... ... . . . . . . .... ... .. . . . . . . . . . . . . . .
11
V.2
COMMAND SET . . . . . . . . . . . . . . . . .... ... ... . . . .... ... ... . . . . . . . . . . . . ....
14
V.3
COMMAND SET SHORT FORM . . . . . . . . . . . . . .... ... ... ... ... ... ... .... ...
16
V.4
STATUS - REPORTS . . . . . . .... .. . . . . . . . . . . . ... ... .. . . . . ... ... ... .... ...
17
V.5
DATA EXCHANGES. . . . . . . . . . . . . . ... ... ... .... ... ... ... ... ... ... .... ...
17
VI
COMMAND SET DESCRIPTION . . . . ... ... ... .... ... ... ... ... ... ... .... ...
18
VII
STATUS DESCRIPTION . . . . . . . . . . . .. ... ... .... ... ... ... ... ... ... .... ...
27
VII.1
COMMAND ACKNOWLEDGE AND REPORT . . . .... ... ... ... ... ... ... .... ...
27
VII.2
MODEM STATUS . . . .... ... ... .. ..... . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . .
28
VIII
TONE DETECTORS . . . . .... ... .. . . . . . . . . . . . ... .. . . . . . . . ... ... ... .... .. .
34
VIII.1
OVERVIEW. .... .... .. . . . . . . . . . . ... ... ... .... ... ... ... ... ... ... .... ...
34
VIII.2
DESCRIPTION . .... . . . . . . . . . . . . . . . . . . . . . . .... ... .. . . .. ... ... ... .... ...
34
VIII.3
EXAMPLE . . . . . . . . . . . . . . . .... .. . . . . . . . . . . . ... .. . . . . . . . ... ... ... .... .. .
38
IX
BUFFER OPERATIONS. . . . . . . . . . . . .. ... ... .... ... ... ... ... ... ... .... ...
38
IX.1
INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . .... ... .. . . .. ... ... ... .... ...
38
IX.2
RECEIVE OPERATIONS OVERVIEW . . . . . . . . . . . . .... ... ... . ... . . . . . . . . ....
39
IX.3
TRANSMIT OPERATIONS OVERVIEW. .... ... . . . .... ... ... . . . . . . . . . . . . ....
39
IX.4
BUFFER STATUS AND FORMAT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . .... ...
40
IX.5
RECEIVE BUFFER . . . . . . . . . . . . . . . ... ... ... .... ... ... ... ... ... ... .... ...
40
IX.6
DATA BUFFER MANAGEMENT. . . . . . . . . . . ... ... ... .... .. . . . . . . . . . . . .. ... .
40
X
DEFAULT CALL PROGRESS TONE DETECTORS .. ... ... . . . . .. .. .. . . . . . . ...
42
XI
DEFAULT ANSWER TONE DETECTORS . .... .... ... ... ... ... ... ... .... ...
42
XII
ELECTRICAL SCHEMATICS. . . . . . . ... ... ... .... ... ... ... ... ... ... .... ...
42
XIII
PCB DESIGN GUIDELINES. . . . . . . . ... ... ... .... ... ... ... ... ... ... .... ...
43
ST75C520
2/45


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