参数资料
型号: IDT82V3280DQG
厂商: INTEGRATED DEVICE TECHNOLOGY INC
元件分类: 通信及网络
英文描述: WAN PLL
中文描述: SPECIALTY TELECOM CIRCUIT, PQFP100
封装: GREEN, TQFP-100
文件页数: 28/167页
文件大小: 1039K
代理商: IDT82V3280DQG
IDT82V3280
WAN PLL
Functional Description
28
June 19, 2006
3.7.3
PHASE LOCK ALARM (T0 ONLY)
A phase lock alarm will be raised when the selected input clock can
not be locked in T0 DPLL within a certain period. This period can be cal-
culated as follows:
Period (sec.) = TIME_OUT_VALUE[5:0] X MULTI_FACTOR[1:0]
The phase lock alarm is indicated by the corresponding
INn_PH_LOCK_ALARM bit (14
n
1).
The phase lock alarm can be cleared by the following two ways, as
selected by the PH_ALARM_TIMEOUT bit:
Be cleared when a ‘1’ is written to the corresponding
INn_PH_LOCK_ALARM bit;
Be cleared after the period (
= TIME_OUT_VALUE[5:0] X
MULTI_FACTOR[1:0] in second
) which starts from when the
alarm is raised.
The selected input clock with a phase lock alarm is disqualified for T0
DPLL locking.
Note that no phase lock alarm is raised if the T4 selected input clock
can not be locked.
Table 12: Related Bit / Register in Chapter 3.7
Bit
Register
Address (Hex)
FAST_LOS_SW
PH_LOS_FINE_LIMT[2:0]
FINE_PH_LOS_LIMT_EN
MULTI_PH_8K_4K_2K_EN
WIDE_EN
PH_LOS_COARSE_LIMT[3:0]
COARSE_PH_LOS_LIMT_EN
T0_DPLL_SOFT_FREQ_ALARM
T4_DPLL_SOFT_FREQ_ALARM
T0_DPLL_LOCK
T4_DPLL_LOCK
DPLL_FREQ_SOFT_LIMT[6:0]
FREQ_LIMT_PH_LOS
PHASE_LOSS_FINE_LIMIT_CNFG
5B *
PHASE_LOSS_COARSE_LIMIT_CNFG
5A *
OPERATING_STS
52
DPLL_FREQ_SOFT_LIMIT_CNFG
65
DPLL_FREQ_HARD_LIMT[15:0]
DPLL_FREQ_HARD_LIMIT[15:8]_CNFG,
DPLL_FREQ_HARD_LIMIT[7:0]_CNFG
INTERRUPTS3_STS
67, 66
T4_STS
1
T4_STS
2
0F
INTERRUPTS3_ENABLE_CNFG
12
TIME_OUT_VALUE[5:0]
MULTI_FACTOR[1:0]
INn_PH_LOCK_ALARM (14
n
1)
PH_ALARM_TIMEOUT
T4_T0_SEL
Note: *
The setting in the 5A and 5B registers is either for T0 path or for T4 path, as determined by the T4_T0_SEL bit.
PHASE_ALARM_TIME_OUT_CNFG
08
IN1_IN2_STS ~ IN13_IN14_STS
INPUT_MODE_CNFG
T4_T0_REG_SEL_CNFG
43 ~ 49
09
07
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