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ACS8520 Datasheet(PDF) 87 Page - Semtech Corporation

Part # ACS8520
Description  Synchronous Equipment Timing Source for Stratum 3/4E/4 and SMC Systems
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

ACS8520 Datasheet(HTML) 87 Page - Semtech Corporation

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ADVANCED COMMUNICATIONS
FINAL
DATASHEET
Revision 3.01/October 2003 © Semtech Corp.
Page 87
www.semtech.com
ACS8520 SETS
Address (hex):
39
Register Name cnfg_digtial_frequencies
Description
(R/W) Configures the actual
frequencies of Digital1 & Digital2.
Default Value
0000 1000
Bit 7Bit 6
Bit 5Bit 4
Bit 3Bit 2
Bit 1Bit 0
digital2_frequency
digital1_frequency
Bit No.
Description
Bit Value
Value Description
[7:6]
digital2_frequency
Configures the frequency of Digital2. Whether this is
SONET or SDH based is configured by Bit 6
(dig2_sonsdh) of Reg. 38.
00
01
10
11
Digital2 set to 1544 kHz or 2048 kHz.
Digital2 set to 3088 kHz or 4096 kHz.
Digital2 set to 6176 kHz or 8192 kHz.
Digital2 set to 12353 kHz or 16384 kHz.
[5:4]
digital1_frequency
Configures the frequency of Digital1. Whether this is
SONET or SDH based is configured by Bit 5
(dig1_sonsdh) of Reg. 38.
00
01
10
11
Digital1 set to 1544 kHz or 2048 kHz.
Digital1 set to 3088 kHz or 4096 kHz.
Digital1 set to 6176 kHz or 8192 kHz.
Digital1 set to 12353 kHz or 16384 kHz.
[3:0]
Not used.
Address (hex):
3A
Register Name cnfg_differential_outputs
Description
(R/W) Configures the electrical
compatibility of the differential
output drivers to be 3 V PECL or
3V LVDS.
Default Value
1100 0110
Bit 7Bit 6
Bit 5Bit 4
Bit 3Bit 2
Bit 1Bit 0
TO7_PECL_LVDS
TO6_LVDS_PECL
Bit No.
Description
Bit Value
Value Description
[7:4]
Not used.
-
-
[3:2]
TO7_PECL_LVDS
Selection of the electrical compatibility of TO7
between 3 V PECL and 3 V LVDS.
00
01
10
11
Output TO7 disabled.
Output T07 3 V PECL compatible.
Output TO7 3 V LVDS compatible.
Not used.
[1:0]
TO6_LVDS_PECL
Selection of the electrical compatibility of TO6
between 3 V PECL and 3 V LVDS.
00
01
10
11
Output TO6 disabled.
Output T06 3 V PECL compatible.
Output TO6 3 V LVDS compatible.
Not used.


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