參數(shù)資料
型號: DS21Q42T+
廠商: Maxim Integrated Products
文件頁數(shù): 65/116頁
文件大?。?/td> 0K
描述: IC FRAMER ENHANCED T1 4X 128TQFP
標(biāo)準(zhǔn)包裝: 72
控制器類型: T1 調(diào)幀器
接口: 并行/串行
電源電壓: 2.97 V ~ 3.63 V
電流 - 電源: 75mA
工作溫度: 0°C ~ 70°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
DS21Q42
52 of 116
TS1 TO TS12: TRANSMIT SIGNALING REGISTERS (Address=70 to 7B Hex)
(MSB)
LSB)
A(8)
A(7)
A(6)
A(5)
A(4)
A(3)
A(2)
A(1)
TS1 (70)
A(16)
A(15)
A(14)
A(13)
A(12)
A(11)
A(10)
A(9)
TS2 (71)
A(24)
A(23)
A(22)
A(21)
A(20)
A(19)
A(18)
A(17)
TS3 (72)
B(8)
B(7)
B(6)
B(5)
B(4)
B(3)
B(2)
B(1)
TS4 (73)
B(16)
B(15)
B(14)
B(13)
B(12)
B(11)
B(10)
B(9)
TS5 (74)
B(24)
B(23)
B(22)
B(21)
B(20)
B(19)
B(18)
B(17)
TS7 (75)
A/C(8)
A/C(7)
A/C(6)
A/C(5)
A/C(4)
A/C(3)
A/C(2)
A/C(1)
TS7 (76)
A/C(16) A/C(15) A/C(14) A/C(13) A/C(12) A/C(11) A/C(10) A/C(9)
TS8 (77)
A/C(24) A/C(23) A/C(22) A/C(21) A/C(20) A/C(19) A/C(18) A/C(17) TS9 (78)
B/D(8)
B/D(7)
B/D(6)
B/D(5)
B/D(4)
B/D(3)
B/D(2)
B/D(1)
TS10 (79)
B/D(16) B/D(15) B/D(14) B/D(13) B/D(12) B/D(11) B/D(10) B/D(9)
TS11 (7A)
B/D(24) B/D(23) B/D(22) B/D(21) B/D(20) B/D(19) B/D(18) B/D(17) TS12 (7B)
SYMBOL
POSITION
NAME AND DESCRIPTION
D(24)
TS12.7
Signaling Bit D in Channel 24
A(1)
TS1.0
Signaling Bit A in Channel 1
Each Transmit Signaling Register (TS1 to TS12) contains the Robbed Bit signaling for eight DS0
channels that will be inserted into the outgoing stream if enabled to do so via TCR1.4. In the ESF
framing mode, there can be up to four signaling bits per channel (A, B, C, and D). On multiframe
boundaries, the framer will load the values present in the Transmit Signaling Register into an outgoing
signaling shift register that is internal to the device. The user can utilize the Transmit Multiframe
Interrupt in Status Register 2 (SR2.6) to know when to update the signaling bits. In the ESF framing
mode, the interrupt will come every 3 ms and the user has a full 3ms to update the TSRs. In the D4
framing mode, there are only two signaling bits per channel (A and B). However in the D4 framing
mode, the framer uses the C and D bit positions as the A and B bit positions for the next multiframe. The
framer will load the values in the TSRs into the outgoing shift register every other D4 multiframe.
10.2 Hardware-Based Signaling
Receive Side
In the receive side of the hardware based signaling, there are two operating modes for the signaling
buffer; signaling extraction and signaling re–insertion. Signaling extraction involves pulling the signaling
bits from the receive data stream and buffering them over a four multiframe buffer and outputting them in
a serial PCM fashion on a channel–by–channel basis at the RSIG output. This mode is always enabled.
In this mode, the receive elastic store may be enabled or disabled. If the receive elastic store is enabled,
then the backplane clock (RSYSCLK) can be either 1.544 MHz or 2.048 MHz. In the ESF framing
mode, the ABCD signaling bits are output on RSIG in the lower nibble of each channel. The RSIG data
is updated once a multiframe (3 ms) unless a freeze is in effect. In the D4 framing mode, the AB
signaling bits are output twice on RSIG in the lower nibble of each channel. Hence, bits 5 and 6 contain
the same data as bits 7 and 8 respectively in each channel. The RSIG data is updated once a multiframe
(1.5 ms) unless a freeze is in effect. See the timing diagrams in Section 20 for some examples.
相關(guān)PDF資料
PDF描述
DS21Q43-ATN IC FRAMER E1 QUAD 5V 128-TQFP
DS21Q44T+ IC FRAMER ENHANCED E1 4X 128TQFP
DS21Q50LN IC TRANSCEIVER E1 QD IND 100LQFP
DS21Q55 IC TXRX QUAD T1/E1/J1 SCT 256BGA
DS21Q59LN+ IC TXRX E1 QUAD 100-LQFP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS21Q42T+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Enhanced Quad T1 Framer RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流(最大值):595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21Q42TN 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Enhanced Quad T1 Framer RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流(最大值):595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21Q43A 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Quad E1 Framer
DS21Q43AT 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Quad E1 Framer RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流(最大值):595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS21Q43AT+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Quad E1 Framer RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流(最大值):595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray