ACS8526 Semtech Corporation, ACS8526 Datasheet - Page 48

• Manufacturer Part Number: ACS8526
• Description: Lc/p Lite Line Card Protection Switch For Pdh, Sonet, or SDH Systems
• Manufacturer: Semtech Corporation

Address (hex):
Address (hex):
Revision 4.00/September 2003 © Semtech Corp.
ADVANCED COMMUNICATIONS
Register Name
MFrSync_en
Register Name
Bit No.
Bit No.
Bit 7
[5:0]
Bit 7
[7:4]
[2:0]
6
63 (cont...)
64
cnfg_output_frequency
(MFrSync/FrSync)
FrSync_en
Description
FrSync_en
Register bit to enable the 8 kHz Sync output
(FrSync).
Not used.
cnfg_DPLL2_frequency
Description
Not used.
DPLL2_frequency
Register to configure the frequency of operation of
DPLL2. The frequency of DPLL2 will also affect the
frequency of the APLL2 which, in turn, affects the
frequencies available at outputs O1 and O2 see
Reg. 61 and Reg. 62. It is also possible to not use
DPLL2 at all, but use the APLL2 to run directly from
DPLL1 output, see Reg. 65
(cnfg_DPLL1_frequency). If any frequencies are
required from the APLL2 then DPLL2 should not be
squelched, as the APLL2 input is squelched and the
APLL2 will free run.
Bit 6
Bit 6
Bit 5
Bit 5
Description
Description
Bit 4
Bit 4
FINAL
Page 48
(R/W) Register to configure and
enable the frequencies available
on outputs MFrSync and FrSync.
(R/W) Register to configure
DPLL2 Frequency
Bit Value
Bit Value
Bit 3
Bit 3
000
001
010
011
100
101
110
111
0
1
-
-
Value Description
Output FrSync disabled.
Output FrSync enabled.
-
Value Description
-
DPLL2 squelched (clock off).
77.76 MHz (OC-N rates),
APLL2 frequency = 311.04 MHz.
12E1, APLL2 frequency = 98.304 MHz.
16E1, APLL2 frequency = 131.072 MHz.
24DS1, APLL2 frequency = 148.224 MHz.
16DS1, APLL2 frequency = 98.816 MHz.
E3, APLL2 frequency = 274.944 MHz.
DS3, APLL2 frequency = 178.944 MHz.
Bit 2
Bit 2
ACS8526 LC/P LITE
DPLL2_frequency
Default Value
Default Value
Bit 1
Bit 1
DATASHEET
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1100 0000
0000 0000
Bit 0
Bit 0