参数资料
型号: DS21Q44T
厂商: MAXIM INTEGRATED PRODUCTS INC
元件分类: Digital Transmission Controller
英文描述: DATACOM, FRAMER, PQFP128
封装: TQFP-128
文件页数: 19/105页
文件大小: 702K
代理商: DS21Q44T
DS21Q44
20 of 105
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 port into the various defined
IEEE 1149.1 states. If not used, this pin should be pulled high. This function is available when FMS = 0.
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. If not
used, this pin should be tied to VSS. This function is available when FMS = 0.
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. If not used, this pin
should be pulled high. This function is available when FMS = 0.
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. This function is available when FMS = 0.
SUPPLY PINS
Signal Name:
VDD
Signal Description:
Positive Supply
Signal Type:
Supply
2.97 to 3.63 volts.
Signal Name:
VSS
Signal Description:
Signal Ground
Signal Type:
Supply
0.0 volts.
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