ACS8526 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'ACS8526' PDF : 74 Pages View PDF
ACS8526 LC/P LITE
ADVANCED COMMUNICATIONS
Address (hex): 65
Register Name cnfg_DPLL1_frequency
FINAL
Description
(R/W) Register to configure
DPLL1 and MUX2 parameters.
DATASHEET
Default Value 0000 0001
Bit 7
Bit 6
APLL2_for_
DPLL1_E1/DS1
Bit 5
Bit 4
DPLL1_freq_to_APLL2
Bit 3
Bit 2
Bit 1
DPLL1_frequency
Bit 0
Bit No.
Description
Bit Value Value Description
7
6
[5:4]
3
[2:0]
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.
-
-
0
APLL2 takes its input from DPLL2.
1
APLL2 takes its input from DPLL1.
00
12E1, APLL2 frequency = 98.304 MHz.
01
16E1, APLL2 frequency = 131.072 MHz.
10
24DS1, APLL2 frequency = 148.224 MHz.
11
16DS1, APLL2 frequency = 98.816 MHz.
-
-
000
77.76 MHz, digital feedback,
APLL1 frequency = 311.04 MHz.
001
77.76 MHz, analog feedback, (via APLL3)
APLL1 frequency = 311.04 MHz.
010
12E1, APLL1 frequency = 98.304 MHz.
011
16E1, APLL1 frequency = 131.072 MHz.
100
24DS1, APLL1 frequency = 148.224 MHz.
101
16DS1, APLL1 frequency = 98.816 MHz.
110
Not used.
111
Not used.
Note...001 is the only selection that does not
bypass APLL3. All other selections use digital
feedback.
Address (hex): 66
Register Name cnfg_DPLL2_bw
Bit 7
Bit 6
Bit No.
[7:2]
Description
Not used.
Bit 5
Description
Bit 4
(R/W) Register to configure the Default Value 0000 0000
bandwidth of DPLL2.
Bit 3
Bit 2
Bit 1
Bit 0
DPLL2_bandwidth
Bit Value Value Description
-
-
Revision 4.01/June 2006 © Semtech Corp.
Page 49
www.semtech.com
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