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Tap ac switching characteristics, Tap timing and test conditions – Cypress CY7C1410JV18 User Manual

Page 16

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CY7C1410JV18, CY7C1425JV18
CY7C1412JV18, CY7C1414JV18

Document #: 001-12561 Rev. *D

Page 16 of 26

TAP AC Switching Characteristics

Over the Operating Range

[13, 14]

Parameter

Description

Min

Max

Unit

t

TCYC

TCK Clock Cycle Time

50

ns

t

TF

TCK Clock Frequency

20

MHz

t

TH

TCK Clock HIGH

20

ns

t

TL

TCK Clock LOW

20

ns

Setup Times

t

TMSS

TMS Setup to TCK Clock Rise

5

ns

t

TDIS

TDI Setup to TCK Clock Rise

5

ns

t

CS

Capture Setup to TCK Rise

5

ns

Hold Times

t

TMSH

TMS Hold after TCK Clock Rise

5

ns

t

TDIH

TDI Hold after Clock Rise

5

ns

t

CH

Capture Hold after Clock Rise

5

ns

Output Times

t

TDOV

TCK Clock LOW to TDO Valid

10

ns

t

TDOX

TCK Clock LOW to TDO Invalid

0

ns

TAP Timing and Test Conditions

Figure 2

shows the TAP timing and test conditions.

[14]

Figure 2. TAP Timing and Test Conditions

t

TL

t

TH

(a)

TDO

C

L

= 20 pF

Z

0

= 50

Ω

GND

0.9V

50

Ω

1.8V

0V

ALL INPUT PULSES

0.9V

Test Clock

Test Mode Select

TCK

TMS

Test Data In
TDI

Test Data Out

t

TCYC

t

TMSH

t

TMSS

t

TDIS

t

TDIH

t

TDOV

t

TDOX

TDO

Notes

13. t

CS

and t

CH

refer to the setup and hold time requirements of latching data from the boundary scan register.

14. Test conditions are specified using the load in TAP AC Test Conditions. t

R

/t

F

= 1 ns.

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