ACS8526LC Semtech Corporation, ACS8526LC Datasheet - Page 49

• Manufacturer Part Number: ACS8526LC
• Description: Line Card Protection Switch for PDH, Sonet or SDH Systems
• Manufacturer: Semtech Corporation

Address (hex):
Address (hex):
Revision 4.01/June 2006 © Semtech Corp.
ADVANCED COMMUNICATIONS
Register Name
Register Name
Bit No.
Bit No.
Bit 7
[5:4]
[2:0]
Bit 7
[7:2]
7
6
3
65
66
cnfg_DPLL1_frequency
APLL2_for_
DPLL1_E1/DS1
Description
Not used.
APLL2_for_DPLL1_E1/DS1
Register bit to control MUX2 which selects whether
the APLL2 takes its input from DPLL2 or DPLL1. If
DPLL1 is selected then the frequency is controlled
by Bits [5:4], DPLL1_freq_to_APLL2.
DPLL1_freq_to_APLL2
Register to select the frequency/mode of DPLL1
which is driven to the APLL2 when selected by Bit 6,
APLL2_for_DPLL1_E1/DS1.
Not used.
DPLL1_frequency
Register to configure the frequency of operation of
DPLL1/APLL1. This register affects the frequencies
available at outputs O1 and O2, see Reg. 61 and
Reg. 62.
cnfg_DPLL2_bw
Description
Not used.
Bit 6
Bit 6
Bit 5
DPLL1_freq_to_APLL2
Bit 5
Description
Description
Bit 4
Bit 4
FINAL
Page 49
(R/W) Register to configure
DPLL1 and MUX2 parameters.
(R/W) Register to configure the
bandwidth of DPLL2.
Bit Value
Bit Value
Bit 3
Bit 3
000
001
010
011
100
101
110
111
00
01
10
11
0
1
-
-
-
Value Description
-
APLL2 takes its input from DPLL2.
APLL2 takes its input from DPLL1.
12E1, APLL2 frequency = 98.304 MHz.
16E1, APLL2 frequency = 131.072 MHz.
24DS1, APLL2 frequency = 148.224 MHz.
16DS1, APLL2 frequency = 98.816 MHz.
-
77.76 MHz, digital feedback,
APLL1 frequency = 311.04 MHz.
77.76 MHz, analog feedback, (via APLL3)
APLL1 frequency = 311.04 MHz.
12E1, APLL1 frequency = 98.304 MHz.
16E1, APLL1 frequency = 131.072 MHz.
24DS1, APLL1 frequency = 148.224 MHz.
16DS1, APLL1 frequency = 98.816 MHz.
Not used.
Not used.
Note...001 is the only selection that does not
bypass APLL3. All other selections use digital
feedback.
Value Description
-
Bit 2
Bit 2
ACS8526 LC/P LITE
DPLL1_frequency
Default Value
Default Value
Bit 1
Bit 1
DPLL2_bandwidth
DATASHEET
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0000 0001
0000 0000
Bit 0
Bit 0