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DS21552L Datasheet(PDF) 98 Page - Dallas Semiconductor

Part # DS21552L
Description  3.3V DS21352 and 5V DS21552 T1 Single-Chip Transceivers
PDF  137 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS21552L Datasheet(HTML) 98 Page - Dallas Semiconductor

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DS21352/DS21552
98 of 137
The DS21352/552 are enhanced versions of the DS2152 and are backward pin-compatible. The JTAG
feature uses pins that had no function in the DS2152. When using the JTAG feature, be sure FMS (pin
76) is tied LOW enabling the newly defined pins of the DS21352/552.
Details on Boundary Scan
Architecture and the Test Access Port can be found in IEEE 1149.1-1990, IEEE 1149.1a-1993, and IEEE
1149.1b-1994.
The Test Access Port has the necessary interface pins; JTRST, JTCLK, JTMS, JTDI, and JTDO. See the
pin descriptions for details.
Figure 19-1 JTAG FUNCTIONAL BLOCK DIAGRAM
+V
Boundary Scan
Register
Identification
Register
Bypass
Register
Instruction
Register
JTDI
JTMS
JTCLK
JTRST
JTDO
+V
+V
Test Access Port
Controller
MUX
10K
10K
10K
Select
Output Enable



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