参数资料
型号: DS21552L
厂商: Maxim Integrated Products
文件页数: 54/137页
文件大小: 0K
描述: IC TXRX T1 1-CHIP 5V 100-LQFP
产品培训模块: Lead (SnPb) Finish for COTS
产品变化通告: Product Discontinuation 20/Feb/2012
标准包装: 90
功能: 单芯片收发器
接口: E1,HDLC,J1,T1
电路数: 1
电源电压: 4.75 V ~ 5.25 V
电流 - 电源: 75mA
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: DSX-1 和 CSU 线路补偿发生器,HDLC 控制器,带内回路代码发生器和检测器
DS21352/DS21552
23 of 137
4.1.4 JTAG TEST ACCESS PORT PINS
Signal Name:
JTRST
Signal Description:
IEEE 1149.1 Test Reset
Signal Type:
Input
If FMS = 1: JTAG functionality is not available and JTRST is held LOW internally.
If FMS = 0: JTAG functionality is available and JTRST is pulled up internally by a 10k resistor.
If FMS = 0 and boundary scan is not used, this pin should be held low. This signal is used to asynchronously reset the test
access port controller. The device operates as a T1/E1 transceiver if JTRST is pulled low.
Signal Name:
JTMS
Signal Description:
IEEE 1149.1 Test Mode Select
Signal Type:
Input
This pin is sampled on the rising edge of JTCLK and is used to place the test access port into the various defined IEEE 1149.1
states. This pin has a 10k pull up resistor.
Signal Name:
JTCLK
Signal Description:
IEEE 1149.1 Test Clock Signal
Signal Type:
Input
This signal is used to shift data into JTDI on the rising edge and out of JTDO on the falling edge.
Signal Name:
JTDI
Signal Description:
IEEE 1149.1 Test Data Input
Signal Type:
Input
Test instructions and data are clocked into this pin on the rising edge of JTCLK. This pin has a 10k pull up resistor.
Signal Name:
JTDO
Signal Description:
IEEE 1149.1 Test Data Output
Signal Type:
Output
Test instructions and data are clocked out of this pin on the falling edge of JTCLK. If not used, this pin should be left
unconnected.
4.1.5 INTERLEAVE BUS OPERATION PINS
Signal Name:
CI
Signal Description:
Carry In
Signal Type:
Input
A rising edge on this pin causes RSER and RSIG to come out of high Z state and TSER and TSIG to start sampling on the next
rising edge of RSYSCLK/TSYSCLK beginning an I/O sequence of 8 or 256 bits of data. This pin has a 10k pull up resistor.
Signal Name:
CO
Signal Description:
Carry Out
Signal Type:
Output
An output that is set high when the last bit of the 8 or 256 IBO output sequence has occurred on RSER
and RSIG.
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