ACS8514T View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
ACS8514T
Synchronous Equipment Timing Source Partner IC for 2nd T4 DPLL, Accurate Monitoring & Input Extender
Semtech Corporation
'ACS8514T' PDF : 86 Pages View PDF
ACS8514 SETS Buddy
ADVANCED COMMS & SENSING FINAL
DATASHEET
Address(hex): 47 (continued)
Bit No.
Description
[5:0]
divn_value[13:8]
This register, in conjunction with register 46 (cnfg_
freq_divn) represents the integer value by which to
divide inputs that use the DivN pre-divider. The divn
feature supports input frequencies up to a
maximum of 100 MHz; therefore, the maximum
value that should be written to this register is 30D3
hex (12499 dec). Use of higher DivN values may
result in unreliable behaviour.
Bit Value
-
Value Description
The input frequency will be divided by the value
in this register plus 1. i.e. to divide by 8, program
a value of 7.
Address(hex): 48
Register Name cnfg_monitors
Bit 7
Bit 6
Description
(R/W) Configuration register
Default Value 0000 0101*
controlling several input
monitoring and switching options.
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Set to 1
Bit No.
los_flag_on_
TDO
Description
Set to 0
Set to 0
Set to 0
Bit Value
Set to 0
freq_monitor_
soft_enable
Value Description
freq_monitor_
hard_enable
7
Set to 1
To ensure the freq monitors are clocked directly
from the crystal oscillator.
1
-
6
los_flag_on_TDO
0
Normal mode, TDO complies with IEEE 1149.1.
Bit to select whether the mon_ref_fail interrupt from
the Monitor DPLL is flagged on the TDO pin. If
1
TDO pin used to indicate the state of the
enabled this will not strictly conform to the IEEE
main_ref_fail interrupt status. This allows a
1149.1 JTAG standard for the function of the TDO
system to have a hardware indication of a
pin. When enabled the TDO pin will simply mimic the
source failure very rapidly.
state of the mon_ref_fail interrupt status bit.
5,4,3,2
Set to 0.
0
-
1
freq_monitor_soft_enable
Control to enable frequency monitoring of input
reference sources using soft frequency alarms.
0
freq_monitor_hard_enable
Control to enable frequency monitoring of input
reference sources using hard frequency alarms.
0
Soft frequency monitor alarms disabled.
1
Soft frequency monitor alarms enabled.
0
Hard frequency monitor alarms disabled.
1
Hard frequency monitor alarms enabled.
Revision 3.00 April 2007 © Semtech Corp.
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