IDT82V3380A Integrated Device Technology, IDT82V3380A Datasheet - Page 74
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IDT82V3380A
Manufacturer Part Number
IDT82V3380A
Description
Synchronous Ethernet Idt Wan Plltm Idt82v3380a
Manufacturer
Integrated Device Technology
Datasheet
1.IDT82V3380A.pdf
(177 pages)
- Current page: 74 of 177
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MON_SW_PBO_CNFG - Frequency Monitor, Input Clock Selection & PBO Control
Programming Information
IDT82V3380A
Address: 0BH
Type: Read / Write
Default Value: 100X01X1
FREQ_MON_C
Bit
7
6
5
4
3
2
1
0
LK
7
FREQ_MON_HARD_EN
LOS_FLAG_TO_TDO
FREQ_MON_CLK
ULTR_FAST_SW
PBO_FREZ
EXT_SW
PBO_EN
LOS_FLAG_TO
Name
-
_TDO
6
The bit selects a reference clock for input clock frequency monitoring.
0: The output of T0 DPLL.
1: The master clock. (default)
The bit determines whether the interrupt of T0 selected input clock fail - is reported by the TDO pin.
0: Not reported. TDO pin is used as JTAG test data output which complies with IEEE 1149.1. (default)
1: Reported. TDO pin mimics the state of the T0_MAIN_REF_FAILED bit (b6, 0EH) and does not strictly comply with IEEE
1149.1.
This bit determines whether the T0 selected input clock is valid when missing 2 consecutive clock cycles or more.
0: Valid. (default)
1: Invalid.
This bit determines the T0 input clock selection.
0: Forced selection or Automatic selection, as controlled by the T0_INPUT_SEL[3:0] bits (b3~0, 50H).
1: External Fast selection.
The default value of this bit is determined by the FF_SRCSW pin during reset.
This bit is valid only when the PBO is enabled by the PBO_EN bit (b2, 0BH). It determines whether PBO is frozen at the cur-
rent phase offset when a PBO event is triggered.
0: Not frozen. (default)
1: Frozen. Further PBO events are ignored and the current phase offset is maintained.
This bit determines whether PBO is enabled when the T0 selected input clock switch or the T0 DPLL exiting from Holdover
mode or Free-Run mode occurs.
0: Disabled.
1: Enabled. (default)
Reserved.
This bit determines whether the frequency hard alarm is enabled when the frequency of the input clock with respect to the
reference clock is above the frequency hard alarm threshold. The reference clock can be the output of T0 DPLL or the mas-
ter clock, as determined by the FREQ_MON_CLK bit (b7, 0BH).
0: Disabled.
1: Enabled. (default)
ULTR_FAST_SW
5
EXT_SW
4
74
PBO_FREZ
3
Description
PBO_EN
SYNCHRONOUS ETHERNET WAN PLL™
2
1
-
September 30, 2010
FREQ_MON_H
ARD_EN
0
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