参数资料
型号: IDT82P2828BHG
厂商: IDT, Integrated Device Technology Inc
文件页数: 23/154页
文件大小: 0K
描述: IC LIU T1/J1/E1 28+1CH 640-PBGA
标准包装: 5
类型: 线路接口装置(LIU)
规程: E1
电源电压: 3.13 V ~ 3.47 V
安装类型: 表面贴装
封装/外壳: 640-BGA 裸露焊盘
供应商设备封装: 640-PBGA-EP(31x31)
包装: 托盘
其它名称: 82P2828BHG
IDT82P2828
28(+1) CHANNEL HIGH-DENSITY T1/E1/J1 LINE INTERFACE UNIT
Programming Information
119
February 6, 2009
JM - Jitter Measurement Configuration For Channel 0 Register
JIT_PL - Positive Peak Jitter Measurement Low-Byte Register
JIT_PH - Positive Peak Jitter Measurement High-Byte Register
Address: 7E5H
Type: Read / Write
Default Value: 00H
Bit
Name
Description
7 - 3
-
Reserved.
2
JM_STOP
This bit is valid only when the JM_MD bit (b1, JM) is ‘0’.
A transition from ‘0’ to ‘1’ on this bit updates the JIT_PH, JIT_PL and JIT_NH, JIT_NL registers.
This bit must be cleared before the next round.
1
JM_MD
This bit selects the jitter measurement period.
0: The period is determined manually by setting the JM_STOP bit (b2, JM). (default)
1: The period is one second automatically.
0
JM_BW
This bit selects the bandwidth of the measured jitter.
0: 10 Hz ~ 40 KHz (in T1/J1 mode) / 20 Hz ~ 100 KHz (in E1 mode). (default)
1: 8 KHz ~ 40 KHz (in T1/J1 mode) / 18 KHz ~ 100 KHz (in E1 mode).
Address: 7E6H
Type: Read
Default Value: 00H
Bit
Name
Description
7 - 0
JIT_P[7:0]
These bits, together with the JIT_P[11:8] bits, reflect the greatest positive peak value of the demodulated jitter signal which is
measured by channel 0. They are updated automatically or manually, as determined by the JM_MD bit (b1, JM). They should be
read in the next round of jitter measurement; otherwise, they will be overwritten.
The relationship between the greatest positive peak value and the indication in these bits is:
Positive Peak = [JIT_PH, JIT_PL] / 16 (UIpp)
Address: 7E7H
Type: Read
Default Value: 00H
Bit
Name
Description
7 - 4
-
Reserved.
3 - 0
JIT_P[11:8]
(Refer to the description of the JIT_PL register.)
76
54
3
2
1
0
--
-
JM_STOP
JM_MD
JM_BW
7
654
321
0
JIT_P7
JIT_P6
JIT_P5
JIT_P4
JIT_P3
JIT_P2
JIT_P1
JIT_P0
76
54
3
2
1
0
-
JIT_P11
JIT_P10
JIT_P9
JIT_P8
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