DS2196 Dallas Semiconducotr, DS2196 Datasheet - Page 124
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DS2196
Manufacturer Part Number
DS2196
Description
T1 Dual Framer LIU
Manufacturer
Dallas Semiconducotr
Datasheet
1.DS2196.pdf
(157 pages)
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20.
20.1 DESCRIPTION
The DS2196 IEEE 1149.1 design supports the standard instruction codes SAMPLE/PRELOAD,
BYPASS, and EXTEST. Optional public instructions included with this design are HIGHZ, CLAMP,
and IDCODE. See Figure 20-1 for a block diagram. The DS2196 contains the following items, which
meet the requirements, set by the IEEE 1149.1 Standard Test Access Port and Boundary Scan
Architecture.
Test Access Port (TAP)
TAP Controller
Instruction Register
Bypass Register
Boundary Scan Register
Device Identification Register
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 20-1: BOUNDARY SCAN ARCHITECTURE
10K
+V
JTDI
JTAG-BOUNDARY SCAN ARCHITECTURE AND TEST ACCESS PORT
10K
+V
JTMS
Test Access Port
Boundary Scan
Identification
Instruction
Bypass
Register
Controller
Register
Register
Register
JTCLK
10K
+V
JTRST
Select
Output Enable
MUX
124 of 157
JTDO
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