参数资料
型号: DS21Q59L+
厂商: Maxim Integrated Products
文件页数: 14/76页
文件大小: 0K
描述: IC TXRX E1 QUAD 3.3V 100LQFP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 90
功能: 收发器
接口: E1
电路数: 4
电源电压: 3.14 V ~ 3.47 V
电流 - 电源: 230mA
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 100-LQFP
供应商设备封装: 100-LQFP(14x14)
包装: 托盘
包括: AIS 警报检测器和发生器,回送功能,PRBS 发生器 / 检测器,远程检测器和发生器
产品目录页面: 1429 (CN2011-ZH PDF)
DS21Q59 Quad E1 Transceiver
21 of 76
8.2 Framer Loopback
When CCR1.7 is set to 1, the DS21Q59 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 TPOSO and TNEGO.
2) Data input through RPOSI and RNEGI is ignored.
3) 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
3
2
1
0
Name
ECUS
VCRFS
AAIS
ARA
RSERC
LOTCMC
RCLA
TCSS
NAME
BIT
FUNCTION
ECUS
7
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)
VCRFS
6
VCR Function Select. See Section 10 for details.
0 = count bipolar violations (BPVs)
1 = count code violations (CVs)
AAIS
5
Automatic AIS Generation
0 = disabled
1 = enabled
ARA
4
Automatic Remote Alarm Generation
0 = disabled
1 = enabled
RSERC
3
RSER Control
0 = allow RSER to output data as received under all conditions
1 = force RSER to 1 under loss-of-frame alignment conditions
LOTCMC
2
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
RCLA
1
Receive Carrier Loss (RCL) Alternate Criteria
0 = RCL declared upon 255 consecutive 0s (125
ms)
1 = RCL declared upon 2048 consecutive 0s (1ms)
TCSS
0
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
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