CHAPTER 6 JTAG BOUNDARY SCAN
PRELIMINARY
NEC confidential and Proprietary
314
Figure 6-4. Operation of Test Logic (Instruction Scan)
Note
TDR (Test Data Register): Boundary scan register and bypass register
Remark
: Don't care or undefined
E
x i
t 1
-
I R
Run
-
T
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st
/I
dle
Se
le
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-D
R
-Sc
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T
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ic-
Re
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Se
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R-S
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a
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C a p t
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R
S h
i
f t - I R
P
a u s
e -
I
R
E
x i
t 2
-
I R
S h
i
f t - I R
E
x i
t 1
-
I R
U
p
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-IR
R
u n
- T
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t
/
I
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Active
B y p a s s
N e w i n s t r u c t i o n
O l d d a t a
I n a c t i v e
A c t i v e
I n a c t i v e
I n a c t i v e
I n s t r u c t i o n r e g i s t e
JDI pin signal
Input data to IR
IR shift register
Parallel output of IR
Input data to TDR
TDR shift register
Parallel output of TDR
Selected register
JDO enable signal
JDO pin signal
JCK pin signal
JMS pin signal
Controller state
Summary of Contents for UPD98413
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Page 135: ...CHAPTER 4 INTERFACES PRELIMINARY NEC confidential and Proprietary 135 ...
Page 166: ...CHAPTER 5 REGISTERS PRELIMINARY NEC confidential and Proprietary 166 5 2 Register summary ...
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