TABLE 26:
參數(shù)資料
型號(hào)： XRT72L71IQ
廠商： Exar Corporation
文件頁數(shù)： 65/102頁
文件大?。?/td> 0K
描述： IC FRAMER DS3 ATM UNI 160PQFP
產(chǎn)品變化通告： XRT72Lx Series Obsolescence 02/May/2012
標(biāo)準(zhǔn)包裝： 24
控制器類型： DS3 ATM UNI，透明通道調(diào)幀器
電源電壓： 3.3V
電流 - 電源： 120mA
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 160-BQFP
供應(yīng)商設(shè)備封裝： 160-PQFP（28x28）
包裝： 托盤
á
XRT72L71
DS3 ATM UNI/CLEAR CHANNEL FRAMER
REV. 1.1.0
61
TABLE 26: TX DS3 F-BIT MASK2 REGISTER
REGISTER 25
TX DS3 F-BIT MASK2 REGISTER
HEX ADDRESS: 0X19
BIT
FUNCTION
TYPE
DEFAULT
DESCRIPTION-OPERATION
7
F-bit Mask (23)
R/W
0
The Transmit DS3 Framer block performs an XOR operation of the F-Bit
Mask bits, with the corresponding “F” bits, within each outbound DS3 frame.
FBitMask(0) corresponds to first F-Bit (F1) is the DS3 frame, FBitMask (1)
corresponds to 2nd F-Bit (F0)in the DS3 frame,...FBitMask(27) corresponds
to the last F-Bit of the M-Frame.
NOTES:
1. Setting any of these bit-fields to “1” will cause an “erred” F-bit to be
transmitted onto the line.
2. For normal operation, set each of these bit-fields to “0”.
6
F-bit Mask (22)
R/W
0
5
F-bit Mask (21)
R/W
0
4
F-bit Mask (20)
R/W
0
3
F-bit Mask (19)
R/W
0
2
F-bit Mask (18)
R/W
0
1
F-bit Mask (17)
R/W
0
F-bit Mask (16)
R/W
0
TABLE 27: TX DS3 F-BIT MASK3 REGISTER
REGISTER 26
TX DS3 F-BIT MASK3 REGISTER
HEX ADDRESS: 0X1A
BIT
FUNCTION
TYPE
DEFAULT
DESCRIPTION-OPERATION
7
F-bit Mask (15)
R/W
0
The Transmit DS3 Framer block performs an XOR operation of the FBitMask
bits, with the corresponding “F” bits, within each outbound DS3 frame. FBit-
Mask(0) corresponds to first F-Bit (F1) is the DS3 frame, FBitMask (1) corre-
sponds to 2nd F-Bit (F0)in the DS3 frame,...FBitMask(27) corresponds to the
last F-Bit of the M-Frame.
NOTES:
1. Setting any of these bit-fields to “1” will cause an “erred” F-
bit to be transmitted onto the line.
2. For normal operation,set each of these bit-fields to “0”.
6
F-bit Mask (14)
R/W
0
5
F-bit Mask (13)
R/W
0
4
F-bit Mask (12)
R/W
0
3
F-bit Mask (11)
R/W
0
2
F-bit Mask (10)
R/W
0
1
F-bit Mask (9)
R/W
0
F-bit Mask (8)
R/W
0
TABLE 28: TX DS3 F-BIT MASK4 REGISTER
REGISTER 27
TX DS3 F-BIT MASK4 REGISTER
HEX ADDRESS: 0X1B
BIT
FUNCTION
TYPE
DEFAULT
DESCRIPTION-OPERATION
7
F-bit Mask (7)
R/W
0
The Transmit DS3 Framer block performs an XOR operation of the FBitMask
bits, with the corresponding “F” bits, within each outbound DS3 frame. FBit-
Mask(0) corresponds to first F-Bit (F1) is the DS3 frame, FBitMask (1) corre-
sponds to 2nd F-Bit (F0)in the DS3 frame,...FBitMask(27) corresponds to the
last F-Bit of the M-Frame.
NOTES:
1. Setting any of these bit-fields to “1” will cause an “erred” F-bit to be
transmitted onto the line.
2. For normal operation, set each of these bit-fields to “0”.
6
F-bit Mask (6)
R/W
0
5
F-bit Mask (5)
R/W
0
4
F-bit Mask (4)
R/W
0
3
F-bit Mask (3)
R/W
0
2
F-bit Mask (2
R/W
0
1
F-bit Mask (1)
R/W
0
F-bit Mask (0)
R/W
0
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