ACS8525 Semtech Corporation, ACS8525 Datasheet - Page 81

• Manufacturer Part Number: ACS8525
• Description: Line Card Protection Switch For Sonet/sdh Systems
• Manufacturer: Semtech Corporation

Address (hex):
Address (hex):
Revision 3.00/October 2003 © Semtech Corp.
ADVANCED COMMUNICATIONS
Register Name
DPLL2_meas_
DPLL1_ph
Register Name
Bit No.
Bit No.
Bit 7
[5:4]
[2:0]
Bit 7
[7:2]
[1:0]
3
65 (cont...)
66
cnfg_DPLL1_frequency
APLL2_for_
DPLL1_E1/DS1
Description
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 -
Reg. 63.
cnfg_DPLL2_bw
Description
Not used.
DPLL2_bandwidth
Register to configure the bandwidth of DPLL2.
Bit 6
Bit 6
Bit 5
DPLL1_freq_to_APLL2
Bit 5
Description
Description
Bit 4
Bit 4
FINAL
Page 81
(R/W) Register to configure
DPLL1 and several other
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
00
01
10
11
-
-
Value Description
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
-
DPLL2 18 Hz bandwidth.
DPLL2 35 Hz bandwidth.
DPLL2 70 Hz bandwidth.
Not used.
Bit 2
Bit 2
DPLL1_frequency
Default Value
Default Value
ACS8525 LC/P
Bit 1
Bit 1
DPLL2_bandwidth
DATASHEET
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0000 0001
0000 0000
Bit 0
Bit 0