Cypress CY7C1294DV18 Computer Hardware User Manual


 
CY7C1292DV18
CY7C1294DV18
Document #: 001-00350 Rev. *A Page 12 of 23
TAP Controller Block Diagram
0
012..
29
3031
Boundary Scan Register
Identification Register
012..
.
.
106
012
Instruction Register
Bypass Register
Selection
Circuitry
Selection
Circuitry
TAP Controller
TDI
TDO
TCK
TMS
TAP Electrical Characteristics Over the Operating Range
[10, 11, 12]
Parameter Description Test Conditions Min. Max. Unit
V
OH1
Output HIGH Voltage I
OH
=2.0 mA 1.4 V
V
OH2
Output HIGH Voltage I
OH
=100 µA1.6 V
V
OL1
Output LOW Voltage I
OL
= 2.0 mA 0.4 V
V
OL2
Output LOW Voltage I
OL
= 100 µA0.2V
V
IH
Input HIGH Voltage 0.65V
DD
V
DD
+ 0.3 V
V
IL
Input LOW Voltage –0.3 0.35V
DD
V
I
X
Input and OutputLoad Current GND V
I
V
DD
55µA
Notes:
10.These characteristic pertain to the TAP inputs (TMS, TCK, TDI and TDO). Parallel load levels are specified in the Electrical Characteristics table.
11.Overshoot: V
IH
(AC) < V
DDQ
+0.85V (Pulse width less than t
CYC
/2), Undershoot: V
IL
(AC) > –1.5V (Pulse width less than t
CYC
/2).
12.All voltage referenced to Ground.
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