ACS8525AP View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'ACS8525AP' PDF : 112 Pages View PDF
ACS8525A LC/P
ADVANCED COMMS & SENSING
FINAL
DATASHEET
“Digital” Frequencies
8 kHz options available from the O1 and O2 outputs are
Table 11, “O1 and O2 Output Frequency Selection,” lists
Digital1 and Digital2 as available for selection. Digital1 is
a single frequency selected from the range shown in
Table 12. Digital2 is another single frequency selected
from the same range.
all supplied via DPLL1 or DPLL2 (Reg. 7A Bit 7).
The outputs can be either clocks (50:50 mark-space) or
pulses, and can be inverted. When pulse configuration is
used, the pulse width will be one cycle of the rate selected
on Output O2 (Output O2 must be configured to generate
Using Output O2 to Control Pulse Width of 2/8 kHz on FrSync, at least 1,544 kHz to ensure that pulses are generated
MFrSync and 01 Outputs
correctly). Figure 7 shows the various options with the
It can be seen from Table 11 (01 and 02 Output
Frequency Selection) that frequencies listed as 2 kHz and
8 kHz can be selected. Whilst the FrSync and MFrSync
outputs are always supplied from DPLL1, the 2 kHz and
8 kHz controls in Reg. 7A. There is an identical
arrangement with Reg. 7A Bits [1:0] for the 2 kHz 01 and
MFrSync outputs. Outputs FrSync and MFrSync can be
disabled via Reg. 63 Bits [7:6].
Table 12 Digital Frequency Selections
Digital1 Control
Reg. 39 Bits [5:4]
Digital1 SONET/ Digital1 Freq. (MHz)
SDH Reg. 38 Bit5
00
0
2.048
01
0
4.096
10
0
8.192
11
0
16.384
00
1
1.544
01
1
3.088
10
1
6.176
11
1
12.352
Figure 7 Control of 8k Options.
Digital2 Control
Reg. 39 Bits[7:6]
00
01
10
11
00
01
10
11
Digital2 SONET/SDH Digital2 Freq. (MHz)
Reg. 38 Bit6
0
2.048
0
4.096
0
8.192
0
16.384
1
1.544
1
3.088
1
6.176
1
12.352
02 Output
FrSync at 8 kHz, or
Output 01 at 8kHz
a) Clock non-inverted, Reg.7A[3:2] = 00
02 Output
FrSync at 8 kHz, or
Output 01 at 8kHz
b) Pulse non-inverted, Reg.7A[3:2] = 01
02 Output
FrSync at 8 kHz, or
Output 01 at 8kHz
c) Clock inverted, Reg.7A[3:2] = 10
02 Output
FrSync at 8 kHz, or
Output 01 at 8kHz
d) Pulse inverted, Reg.7A[3:2] = 11
F8525_016outputoptions8k_01
Revision 1.00/September 2007 © Semtech Corp.
Page 29
www.semtech.com
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