参数资料
型号: DS21448LDK
厂商: Maxim Integrated Products
文件页数: 11/60页
文件大小: 0K
描述: KIT DESIGN LIU DS21448L T1/J1/E1
标准包装: 1
DS21448 3.3V T1/E1/J1 Quad Line Interface
19 of 60
4.3.3 Control Registers
CCR1 (00H): Common Control Register 1
(MSB)
(LSB)
ETS
NRZE
RCLA
ECUE
JAMUX
TTOJ
TTOR
LOTCMC
NAME
POSITION
FUNCTION
ETS
CCR1.7
E1/T1 Select
0 = E1
1 = T1
NRZE
CCR1.6
NRZ Enable
0 = bipolar data at RPOS/RNEG and TPOS/TNEG
1 = NRZ data at RPOS and TPOS or TNEG; RNEG outputs a positive-going pulse when the
device receives a BPV, CV, or EXZ
RCLA
CCR1.5
Receive-Carrier-Loss Alternate Criteria
0 = RCL declared upon 255 (E1) or 192 (T1) consecutive zeros
1 = RCL declared upon 2048 (E1) or 1544 (T1) consecutive zeros
ECUE
CCR1.4
Error Counter Update Enable. A 0-to-1 transition forces the next receive clock cycle to load the
error counter registers with the latest counts and reset the counters. The user must wait a
minimum of two clock cycles (976ns for E1 and 1296ns for T1) before reading the error count
registers to allow for a proper update. See Section 6 for details.
JAMUX
CCR1.3
Jitter Attenuator Clock Mux. Controls the source for JACLK (Figure 1-1).
0 = JACLK sourced from MCLK (2.048MHz or 1.544MHz at MCLK)
1 = JACLK sourced from internal PLL (2.048MHz at MCLK)
TTOJ
CCR1.2
TCLK to JACLK. Internally connects TCLK to JACLK (Figure 1-3).
0 = disabled
1 = enabled
TTOR
CCR1.1
TCLK to RCLK. Internally connects TCLK to RCLK (Figure 1-3).
0 = disabled
1 = enabled
LOTCMC
CCR1.0
Loss-of-Transmit Clock Mux Control. Determines whether the transmit logic should switch to
JACLK if the TCLK input should fail to transition (Figure 1-3).
0 = do not switch to JACLK if TCLK stops
1 = switch to JACLK if TCLK stops
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DS21448LN+ 功能描述:网络控制器与处理器 IC 3.3V E1/T1/J1 Quad Interface 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
DS21448-LW 功能描述:网络控制器与处理器 IC 3.3V E1/T1/J1 Quad Interface 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
DS21448N 功能描述:网络控制器与处理器 IC 3.3V E1/T1/J1 Quad Interface 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
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