Cypress CY7C1248V18 User Manual
CY7C1246V18, CY7C1257V18
CY7C1248V18, CY7C1250V18
CY7C1248V18, CY7C1250V18
Document Number: 001-06348 Rev. *D
Page 15 of 27
TAP Controller Block Diagram
TAP Electrical Characteristics
Over the Operating Range
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 μA
1.6
V
V
OL1
Output LOW Voltage
I
OL
= 2.0 mA
0.4
V
V
OL2
Output LOW Voltage
I
OL
= 100
μA
0.2
V
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 Output Load Current
GND
≤ V
I
≤ V
DD
−5
5
μA
0
0
1
2
.
.
29
30
31
Boundary Scan Register
Identification Register
0
1
2
.
.
.
.
108
0
1
2
Instruction Register
Bypass Register
Selection
Circuitry
Circuitry
Selection
Circuitry
Circuitry
TAP Controller
TDI
TDO
TCK
TMS
Notes
10. These characteristics apply to the TAP inputs (TMS, TCK, TDI and TDO). Parallel load levels are specified in
.
11. Overshoot: V
IH
(AC) < V
DDQ
+ 0.3V (pulse width less than t
CYC
/2). Undershoot: V
IL
(AC) >
−
0.3V (pulse width less than t
CYC
/2).
12. All voltage refers to ground.