參數資料
型號: IDT82P5088BBG
廠商: IDT, Integrated Device Technology Inc
文件頁數: 16/81頁
文件大?。?/td> 0K
描述: IC LIU T1/E1/J1 OCTAL 256PBGA
標準包裝: 90
功能: 線路接口單元(LIU)
接口: E1,J1,T1
電路數: 8
電源電壓: 1.8V, 3.3V
功率(瓦特): 2.57W
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 256-BGA
供應商設備封裝: 256-PBGA(17x17)
包裝: 托盤
包括: 集成式時鐘適配器
IDT82P5088
UNIVERSAL OCTAL T1/E1/J1 LIU WITH INTEGRATED CLOCK ADAPTER
FUNCTIONAL DESCRIPTION
23
February 5, 2009
TJA_IS bit. When the TJA_IS bit (INTS1, 3BH...) is ‘1’, an interrupt will
be reported on the INT pin if enabled by the TJA_IE bit (INTENC1,
34H...).
To avoid overflowing or underflowing, the JA-Limit function can be
enabled by setting the TJA_LIMT bit (TJACF, 21H...). When the JA-
Limit function is enabled, the speed of the outgoing data will be adjusted
automatically if the FIFO is close to its full or emptiness. The criteria of
speed adjustment start are listed in Table 6. Though the LA-Limit func-
tion can reduce the possibility of FIFO overflow and underflow, the
quality of jitter attenuation is deteriorated.
Selected by the TJITT_TEST bit (TJACF, 21H...), the real time
interval between the read and write pointer of the FIFO or the peak-peak
interval between the read and write pointer of the FIFO can be indicated
in the TJITT[6:0] bits. When the TJITT_TEST bit is ‘0’, the current
interval between the read and write pointer of the FIFO will be written
into the TJITT[6:0] bits. When the TJITT_TEST bit is ‘1’, the current
interval is compared with the old one in the TJITT[6:0] bits and the larger
one will be indicated by the TJITT[6:0] bits.
The performance of Receive Jitter Attenuator meets the ITUT I.431,
G.703, G.736 - 739, G.823, G.824, ETSI 300011, ETSI TBR 12/13,
AT&T TR62411, TR43802, TR-TSY 009, TR-TSY 253, TR-TRY 499
Jitter Tolerance for details.
Table-15 Related Bit / Register In Chapter 3.2.6
Bit
Register
Address (Hex)
TJA_E
Transmit Jitter Attenuation Configura-
tion
X21H
TJA_DP[1:0]
TJA_BW
TJA_LIMT
TJITT_TEST
TJA_IS
Interrupt Status 1
X3BH
TJA_IE
Interrupt Enable Control 1
X34H
TJITT[6:0]
Transmit Jitter Measure Value Indica-
tion
X38H
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