參數(shù)資料
型號(hào)： DS21Q43-ATN
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 30/60頁(yè)
文件大?。?/td> 0K
描述： IC FRAMER E1 QUAD 5V 128-TQFP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 72
控制器類型： E1 調(diào)幀器
接口： 并行/串行
電源電壓： 4.5 V ~ 5.5 V
電流 - 電源： 32mA
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 128-LQFP
供應(yīng)商設(shè)備封裝： 128-LQFP（14x20）
包裝： 管件
DS21Q43A
36 of 60
7.0 SIGNALING OPERATION
The Channel Associated Signaling (CAS) bits embedded in the E1 stream can be extracted from the
receive stream and inserted into the transmit stream by the DS21Q43A. Each of the 30 channels has four
signaling bits (A/B/C/D) associated with it. The numbers in parenthesis () are the channel associated with
a particular signaling bit. The channel numbers have been assigned as described in the ITU/CCITT
documents. For example, channel 1 is associated with timeslot 1 and channel 30 is associated with
timeslot 31. There is a set of 16 registers for the receive side (RS1 to RS16) and 16 registers on the
transmit side (TS1 to TS16). The signaling registers are detailed below.
RS1 TO RS16: RECEIVE SIGNALING REGISTERS (Address=30 to 3F Hex)
(MSB)
(LSB)
0
X
Y
X
RS1 (30)
A(1)
B(1)
C(1)
D(1)
A(16)
B(16)
C(16)
D(16)
RS2 (31)
A(2)
B(2)
C(2)
D(2)
A(17)
B(17)
C(17)
D(17)
RS3 (32)
A(3)
B(3)
C(3)
D(3)
A(18)
B(18)
C(18)
D(18)
RS4 (33)
A(4)
B(4)
C(4)
D(4)
A(19)
B(19)
C(19)
D(19)
RS5 (34)
A(5)
B(5)
C(5)
D(5)
A(20)
B(20)
C(20)
D(20)
RS6 (35)
A(6)
B(6)
C(6)
D(6)
A(21)
B(21)
C(21)
D(21)
RS7 (36)
A(7)
B(7)
C(7)
D(7)
A(22)
B(22)
C(22)
D(22)
RS8 (34)
A(8)
B(8)
C(8)
D(8)
A(23)
B(23)
C(23)
D(23)
RS9 (35)
A(9)
B(9)
C(9)
D(9)
A(24)
B(24)
C(24)
D(24)
RS10 (36)
A(10)
B(10)
C(10)
D(10)
A(25)
B(25)
C(25)
D(25)
RS11 (3A)
A(11)
B(11)
C(11)
D(11)
A(26)
B(26)
C(26)
D(26)
RS12 (3B)
A(12)
B(12)
C(12)
D(12)
A(27)
B(27)
C(27)
D(27)
RS13 (3C)
A(13)
B(13)
C(13)
D(13)
A(28)
B(28)
C(28)
D(28)
RS14 (3D)
A(14)
B(14)
C(14)
D(14)
A(29)
B(29)
C(29)
D(29)
RS15 (3E)
A(15)
B(15)
C(15)
D(15)
A(30)
B(30)
C(30)
D(30)
RS16 (3F)
SYMBOL
POSITION
NAME AND DESCRIPTION
X
RS1.0/1/3
Spare Bits.
Y
RS1.2
Remote Alarm Bit (integrated and reported in SR1.6).
A(1)
RS2.7
Signaling Bit A for Channel 1.
D(30)
RS16.0
Signaling Bit D for Channel 30.
Each Receive Signaling Register (RS1 to RS16) reports the incoming signaling bits from two timeslots.
The bits in the Receive Signaling Registers are updated on multiframe boundaries so the user can utilize
the Receive Multiframe Interrupt in the Receive Status Register 2 (SR2.7) to know when to retrieve the
signaling bits. The user has a full 2 ms to retrieve the signaling bits before the data is lost. The RS
registers are updated under all conditions. Their validity should be qualified by checking for
synchronization at the CAS level. In CCS signaling mode, RS1 to RS16 can also be used to extract
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