Document Number: 001-44060 Rev. *O

Page 14 of 31

CY7C1663KV18/CY7C1665KV18

TAP Controller State Diagram

The state diagram for the TAP controller follows. [15]

TEST-LOGIC

RESET

TEST-LOGIC/

IDLE

SELECT

DR-SCAN

CAPTURE-DR

SHIFT-DR

EXIT1-DR

PAUSE-DR

EXIT2-DR

UPDATE-DR

1

0

1

1

0

1

0

1

0

0

0

1

1

1

0

1

0

1

0

0

0

1

0

1

1

0

1

0

0

1

1

0

SELECT

IR-SCAN

CAPTURE-IR

SHIFT-IR

EXIT1-IR

PAUSE-IR

EXIT2-IR

UPDATE-IR

Note

15. The 0/1 next to each state represents the value at TMS at the rising edge of TCK.