ACS8520 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'ACS8520' PDF : 150 Pages View PDF
ACS8520 SETS
ADVANCED COMMUNICATIONS
Address (hex): 37
Register Name cnfg_uPsel_pins
FINAL
DATASHEET
Description
(RO) Register reflecting the value Default Value 0000 0010*
on the UPSEL device pins.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
upsel_pins_value
Bit 0
Bit No.
Description
Bit Value Value Description
[7:3]
[2:0]
Not used.
-
-
upsel_pins_value
This register always reflects the value present on
the UPSEL pins of the device. At reset this is used to
set the mode of the microprocessor interface.
Following power-up, these pins have no further
effect on the microprocessor interface, hence it is
possible to use the pins and register combination as
a general purpose input for software.
*The default of this register is entirely dependent
on the value of the pins at reset.
000
001
010
011
100
101
110
111
(value at reset)
Not used.
Interface in EPROM boot mode.
Interface in Multiplexed mode.
Interface in Intel mode.
Interface in Motorola mode.
Interface in Serial mode.
Not used.
Not used.
Address (hex): 38
Register Name cnfg_dig_outputs_sonsdh
Description
Configures Digital1 and Digital2
output frequencies to be SONET
or SDH compatible frequencies.
Default Value
0001 1111*
Bit 7
Bit 6
dig2_sonsdh
Bit 5
dig1_sonsdh
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit No.
Description
Bit Value Value Description
7
6
5
[4:0]
Not used.
dig2_sonsdh
Selects whether the frequencies generated by the
Digital2 frequency generator are SONET derived or
SDH.
*Default value of this bit is set by the SONSDHB pin
at power-up.
dig1_sonsdh
Selects whether the frequencies generated by the
Digital1 frequency generator are SONET derived or
SDH.
*Default value of this bit is set by the SONSDHB pin
at power-up.
Not used.
-
-
1
Digital2 can be selected from 1544/3088/6176/
12352 kHz.
0
Digital2 can be selected from 2048/4096/8192/
16384 kHz.
1
Digital1 can be selected from 1544/3088/6176/
12352 kHz.
0
Digital1 can be selected from 2048/4096/8192/
16384 kHz.
-
-
Revision 3.02/October 2005 © Semtech Corp.
Page 86
www.semtech.com
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