CY7C1470V25-250AXC CYPRESS [Cypress Semiconductor], CY7C1470V25-250AXC Datasheet - Page 12

• Manufacturer Part Number: CY7C1470V25-250AXC
• Manufacturer: CYPRESS [Cypress Semiconductor]

Document #: 38-05290 Rev. *E
possible to capture all other signals and simply ignore the
value of the CLK captured in the boundary scan register.
Once the data is captured, it is possible to shift out the data by
putting the TAP into the Shift-DR state. This places the
boundary scan register between the TDI and TDO balls.
Note that since the PRELOAD part of the command is not
implemented, putting the TAP to the Update-DR state while
performing a SAMPLE/PRELOAD instruction will have the
same effect as the Pause-DR command.
TAP Timing
TAP AC Switching Characteristics
Clock
Output Times
Set-up Times
Hold Times
Notes:
10. Test conditions are specified using the load in TAP AC Test Conditions. t
Parameter
9. t
t
t
t
t
t
CS
t
t
TCYC
TDOV
TDOX
TMSS
TMSH
TDIS
TDIH
t
t
t
t
t
TH
CS
CH
TF
TL
and t
CH
refer to the set-up and hold time requirements of latching data from the boundary scan register.
TCK Clock Cycle Time
TCK Clock Frequency
TCK Clock HIGH time
TCK Clock LOW time
TCK Clock LOW to TDO Valid
TCK Clock LOW to TDO Invalid
TMS Set-up to TCK Clock Rise
TDI Set-up to TCK Clock Rise
Capture Set-up to TCK Rise
TMS hold after TCK Clock Rise
TDI Hold after Clock Rise
Capture Hold after Clock Rise
Test Mode Select
Test Data-Out
Test Data-In
Test Clock
(TDO)
(TMS)
(TCK)
(TDI)
1
Description
Over the Operating Range
t TMSS
t TDIS
PRELIMINARY
2
t TMSH
t TDIH
t TH
DON’T CARE
R
/t
t
F
TL
= 1 ns.
3
BYPASS
When the BYPASS instruction is loaded in the instruction
register and the TAP is placed in a Shift-DR state, the bypass
register is placed between the TDI and TDO balls. The
advantage of the BYPASS instruction is that it shortens the
boundary scan path when multiple devices are connected
together on a board.
Reserved
These instructions are not implemented but are reserved for
future use. Do not use these instructions.
[9, 10]
t CYC
UNDEFINED
4
t TDOX
t TDOV
5
Min.
50
25
25
0
5
5
5
5
5
5
CY7C1470V25
CY7C1472V25
CY7C1474V25
6
Max.
20
5
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MHz
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns