ACS8509 Semtech Corporation, ACS8509 Datasheet - Page 30

• Manufacturer Part Number: ACS8509
• Description: Synchronous Equipment Timing Source for Sonet or SDH Network Elements
• Manufacturer: Semtech Corporation

Table 14 Register Description (cont...)
Revision 2.00/January 2006 © Semtech Corp.
ADVANCED COMMUNICATIONS
35
37
Addr.
(Hex)
cnfg_T4
cnfg_uPsel_pins
Register Name
This controls DPLL _T4 (output on O4) and input source selection:
Bits (7:6) Unused.
Bit 5
=1
=0
Bit 4
=1
=0
Bits (3:0) Input source selection. The device will switch to the source shown in this
field for the generation of the T
T
This read only register returns a value indicating the microprocessor type selected at
power up or reset. This is set by the configuration of the UPSEL pins (pins 58 - 60). If
the UPSEL pin configuration is changed while the device is operating no effect will
take place, but this register will reflect that change, so indicating the configuration
that will be implemented at the next power up or reset.
The microprocessor type can be changed with the device operational, though register
7F.
Bits (7:3) Unused.
Bit (2:0)
000
001
010
011
100
101
110
111
IN1
.
DPLL_T4 is turned off (squelched).
DPLL_T4 is on (default).
Selects which DPLL (T4 or T0) source feeds output O4:
DPLL_T0 output is fed to output O4.
DPLL_T4 output is fed to output O4.
Microprocessor type:
OFF (interface disabled),
EPROM,
MULTIPLEXED,
INTEL,
MOTOROLA,
SERIAL,
OFF (interface disabled),
OFF (interface disabled).
OUT4
FINAL
Page 30
signal. If '0' it will select the highest priority active
Description
ACS8509 SETS
Default Value (Bin)
DATASHEET
www.semtech.com
configuration
XX000000
Bits(7:3)=
Bits(2:0)=
UPSEL
XXXXX
pin