ACS8520T Semtech, ACS8520T Datasheet - Page 61

• Manufacturer Part Number: ACS8520T
• Description: Synchronous Equipment Timing Source (SETS) for Stratum 3/4E/4 and SMC Systems
• Manufacturer: Semtech

Address (hex):
Address (hex):
Revision 3.02/October 2005 © Semtech Corp.
ADVANCED COMMUNICATIONS
Register Name
Register Name
Sync_ip_alarm
Bit No.
Bit No.
Bit 7
[7:3]
[2:0]
Bit 7
7
6
5
4
3
07
08
sts_current_DPLL_frequency
[18:16]
Description
Not used.
sts_current_DPLL_frequency[18:16]
When Bit 4 (T4_T0_select) of Reg. 4B
(cnfg_registers_source_select) = 0 the frequency
for the T0 path is reported.
When this Bit 4 = 1 the frequency for the T4 path is
reported.
sts_interrupts
T4_status
Description
Sync_ip_alarm
Interrupt indicating that the Frame Sync input
monitor has hit its alarm limit. Latched until reset by
software writing a 1 to this bit.
T4_status
Interrupt indicating that the T4 DPLL has lost lock (if
it was locked) or gained lock (if it was not locked).
Latched until reset by software writing a 1 to this bit.
Not used.
T4_inputs_failed
Interrupt indicating that no valid inputs are available
to the T4 DPLL. Latched until reset by software
writing a 1 to this bit.
AMI2_Viol
Interrupt indicating that an AMI Violation error has
occurred on input I2. Latched until reset by software
writing a 1 to this bit.
Bit 6
Bit 6
Bit 5
Bit 5
Description
Description
T4_inputs_
failed
Bit 4
Bit 4
FINAL
Page 61
(RO) Bits [18:16] of the current
DPLL frequency.
(R/W) Bits [23:16] of the interrupt
status register.
AMI2_Viol
Bit Value
Bit Value
Bit 3
Bit 3
0
1
0
1
0
1
0
1
-
-
-
Value Description
-
See register description of
sts_current_DPLL_frequency at address 0D hex.
AMI2_LOS
Value Description
Input Frame Sync alarm has not occurred.
Input Frame Sync alarm has occurred.
Writing 1 resets the input to 0.
Input to the T4 DPLL has not changed.
Input to the T4 DPLL has lost/gained lock.
Writing 1 resets the input to 0.
-
T4 DPLL has valid inputs.
T4 DPLL has no valid inputs.
Writing 1 resets the input to 0.
Input I2 has had no violation error.
Input I2 has had a violation error.
Writing 1 resets the input to 0.
Bit 2
Bit 2
sts_current_DPLL_frequency[18:16]
AMI1_Viol
Default Value
Default Value
ACS8520 SETS
Bit 1
Bit 1
DATASHEET
www.semtech.com
0000 0000
0101 0000
AMI1_LOS
Bit 0
Bit 0