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參數(shù)資料
| 型號(hào)： | IDT77155L155PX |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | PHY (TC-PMD) USER NETWORK INTERFACE FOR 155 MBPS ATM NETWORK APPLICATIONS |
| 中文描述： | ATM NETWORK INTERFACE, PQFP128 |
| 封裝： | 20 X 14 MM, PLASTIC, QFP-128 |
| 文件頁數(shù)： | 31/50頁 |
| 文件大?。?/td> | 307K |
| 代理商： | IDT77155L155PX |
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IIDT77155
155Mbps ATM PHY (TC-PMD) USER NETWORK INTERFACE
ADVANCED INFORMATION
Commercial Temperature Range
8.03
31
TRANSMIT POINTER MSB REGISTER DEFAULT = 8’B10010000
ADDRESS 0X46
Bit
Bit 7
Type
R/W
Symbol
NDFVal[3]
Function
New data flag field value to be inserted into the transmit stream if ldPtr is
set or if NDF bit is set.
Bit 6
Bit 5
Bit 4
Bit 3
R/W
R/W
R/W
R/W
NDFVal[2]
NDFVal[1]
NDFVal[0]
ssBit[1]
SONET/SDH switch bit and ss bitsvalue of the transmit stream. If
ssBit[1] is a logic high, then the chip transforms to full SDH mode. By
default (ssBit[1] = ‘0’), the chip follows the SONET specifications.
SONET mode: ssBit[1] = ‘0’
(1) ss bitsof pointer is set to “00” for transmit direction.
(2) Line AIS detection criteria.
AIS-L enter state: 5 consecutive frames with “111” in bits 6-8
of K2 byte are detected.
AIS-L exit state: 5 consecutive frames with pattern other than
“111” in bits 6-8 of K2 byte are detected.
(3) Line RDI detection criteria.
RDI-L enter state: 5 consecutive frames with “110” in bits 6-8
of K2 byte are detected.
RDI-L exit state: 5 consecutive frames with pattern other than
“110” in bits 6-8 of K2 byte are detected.
(4) Path BIP-8 calculation for STS-1 applications
Count 87 columns of SPE including 2 fixed stuffs column
(column 30 and 59).
(5) No consequent actions Line RDI for transmit direction by detection
of B2 EBER (refer to register address ‘h70 BERfail)
SDH mode: ssBit[1] = ‘1’
(1) ss bitsof pointer is set to “10” for transmit direction.
(2) Line AIS detection criteria.
AIS-L enter state: 3 consecutive frames with “111” in bits 6-8
of K2 byte are detected.
AIS-L exit state: 3 consecutive frames with pattern other than
“111” in bits 6-8 of K2 byte are detected.
(3) Line RDI detection criteria.
RDI-L enter state: 3 consecutive frames with “110” in bits 6-8
of K2 byte are detected.
RDI-L exit state: 3 consecutive frames with pattern other than
“110” in bits 6-8 of K2 byte are detected.
(4) Path BIP-8 calculation for STS-1 applications
Count 85 columns of SPE excluding 2 fixed stuffs column
(column 30 and 59).
(5) Generate consequent actions Line RDI for transmit direction by
detection of B2 EBER (refer to register address ‘h70 BERfail)
ss bits value of the transmit stream. ssBit[0] is set to ‘0’.
most significant bits of the arbitrary payload pointer to be inserted into
frame if ldPtris set. A legal value results in the transmit payload pointer
changing to the corresponding byte position. If the frcPtrbit is set, the
payload pointer changes to this arbitrary value but the SPE position
remains unchanged.
Bit 2
Bit 1
R/W
R/W
ssBit[0]
arbPtr[9]
Bit 0
R/W
arbPtr[8]
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