Cypress NoBL CY7C1470V33 User Manual download pdf (Page 13)

CY7C1470V33

CY7C1472V33

CY7C1474V33

Document #: 38-05289 Rev. *I Page 13 of 29

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.

BYPASS

When the BYPASS instruction is loaded in the instruction

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.

TAP Timing

Test Clock

(TCK)

123456

est Mode Select

(TMS)

Test Data-Out

(TDO)

CYC

Test Data-In

(TDI)

TMSH

TMSS

TDIH

TDIS

TDOX

TDOV

DON’T CARE UNDEFINED

TAP AC Switching Characteristics Over the Operating Range

[9, 10]

Parameter Description Min. Max Unit

Clock

TCYC

TCK Clock Cycle Time 50 ns

TCK Clock Frequency 20 MHz

TCK Clock HIGH time 20 ns

TCK Clock LOW time 20 ns

Output Times

TDOV

TCK Clock LOW to TDO Valid 10 ns

TDOX

TCK Clock LOW to TDO Invalid 0 ns

Set-up Times

TMSS

TMS Set-up to TCK Clock Rise 5 ns

TDIS

TDI Set-up to TCK Clock Rise 5 ns

Capture Set-up to TCK Rise 5 ns

Hold Times

TMSH

TMS Hold after TCK Clock Rise 5 ns

TDIH

TDI Hold after Clock Rise 5 ns

Capture Hold after Clock Rise 5 ns

Notes:

9. t

and t

refer to the set-up and hold time requirements of latching data from the boundary scan register.

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

= 1 ns.

[+] Feedback

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 28 29

Comments to this Manuals

No comments

Cypress NoBL CY7C1470V33 User Manual Page 13

Comments to this Manuals

Related products and manuals for Unknown Cypress NoBL CY7C1470V33