ACS8520T Semtech, ACS8520T Datasheet - Page 87

• Manufacturer Part Number: ACS8520T
• Description: Synchronous Equipment Timing Source (SETS) for Stratum 3/4E/4 and SMC Systems
• Manufacturer: Semtech

Address (hex):
Address (hex):
Revision 3.02/October 2005 © Semtech Corp.
ADVANCED COMMUNICATIONS
Register Name
Register Name
Bit No.
Bit No.
Bit 7
[7:6]
[5:4]
[3:0]
Bit 7
[7:4]
[3:2]
[1:0]
digital2_frequency
39
3A
cnfg_digtial_frequencies
Description
digital2_frequency
Configures the frequency of Digital2. Whether this is
SONET or SDH based is configured by Bit 6
(dig2_sonsdh) of Reg. 38.
digital1_frequency
Configures the frequency of Digital1. Whether this is
SONET or SDH based is configured by Bit 5
(dig1_sonsdh) of Reg. 38.
Not used.
cnfg_differential_outputs
Description
Not used.
TO7_PECL_LVDS
Selection of the electrical compatibility of TO7
between 3 V PECL and 3 V LVDS.
TO6_LVDS_PECL
Selection of the electrical compatibility of TO6
between 3 V PECL and 3 V LVDS.
Bit 6
Bit 6
Bit 5
Bit 5
digital1_frequency
Description
Description
Bit 4
Bit 4
FINAL
Page 87
(R/W) Configures the actual
frequencies of Digital1 & Digital2.
(R/W) Configures the electrical
compatibility of the differential
output drivers to be 3 V PECL or
3 V LVDS.
Bit Value
Bit Value
Bit 3
Bit 3
00
01
10
11
00
01
10
11
00
01
10
11
00
01
10
11
-
TO7_PECL_LVDS
Value Description
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.
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.
Value Description
-
Output TO7 disabled.
Output T07 3 V PECL compatible.
Output TO7 3 V LVDS compatible.
Not used.
Output TO6 disabled.
Output T06 3 V PECL compatible.
Output TO6 3 V LVDS compatible.
Not used.
Bit 2
Bit 2
Default Value
Default Value
ACS8520 SETS
Bit 1
Bit 1
TO6_LVDS_PECL
DATASHEET
www.semtech.com
0000 1000
1100 0110
Bit 0
Bit 0