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| 型号： | DS21Q58 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | Dallas Semiconductor |
| 中文描述： | E1四收发器 |
| 文件页数： | 21/74页 |
| 文件大小： | 647K |
| 代理商： | DS21Q58 |
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DS21Q58 E1 Quad Transceiver
21 of 74
8.2 Framer Loopback
When CCR1.7 is set to 1, the DS21Q58 enters a framer loopback (FLB) mode (
Figure 3-1
). This loopback is useful
in testing and debugging applications. In FLB mode, the SCT loops data from the transmitter back to the receiver.
When FLB is enabled, the following occurs:
1) Data is transmitted as normal at TTIP and TRING.
2) The RCLK output is replaced with the TCLK input.
Register Name:
CCR2
Register Description:
Common Control Register 2
Register Address:
13 Hex
Bit #
7
6
5
4
Name
ECUS
VCRFS
AAIS
ARA
RSERC
NAME
BIT
FUNCTION
Error Counter Update Select.
See Section
10
for details.
0 = update error counters once a second
1 = update error counters every 62.5ms (500 frames)
VCR Function Select.
See Section
10
for details.
0 = count bipolar violations (BPVs)
1 = count code violations (CVs)
Automatic AIS Generation
0 = disabled
1 = enabled
Automatic Remote Alarm Generation
0 = disabled
1 = enabled
RSER Control
0 = allow RSER to output data as received under all conditions
1 = force RSER to 1 under loss-of-frame alignment conditions
Loss-of-Transmit Clock Mux Control.
Determines whether the transmit
formatter should switch to the ever present RCLK if the TCLK should fail to
transition.
0 = do not switch to RCLK if TCLK stops
1 = switch to RCLK if TCLK stops
Receive Carrier Loss (RCL) Alternate Criteria
0 = RCL declared upon 255 consecutive 0s (125 s)
1 = RCL declared upon 2048 consecutive 0s (1ms)
Transmit Clock Source Select.
This function allows the user to internally
select RCLK as the clock source for the transmit formatter.
0 = source of transmit clock is determined by CCR2.2 (LOTCMC)
1 = forces transmitter to internally switch to RCLK as source of transmit clock;
signal at TCLK pin is ignored
3
2
1
0
LOTCMC
RCLA
TCSS
ECUS
7
VCRFS
6
AAIS
5
ARA
4
RSERC
3
LOTCMC
2
RCLA
1
TCSS
0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS21Q58L | 功能描述:网络控制器与处理器 IC Quad E1 Transceiver RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS21Q58L+ | 功能描述:网络控制器与处理器 IC Quad E1 Transceiver RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS21Q58LN | 功能描述:网络控制器与处理器 IC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS21Q58LN+ | 功能描述:网络控制器与处理器 IC Quad E1 Transceiver RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS21Q59 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:RELIABILITY REPORT FOR DS21Q59, REV A2 |
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