CY7C1347D-166AC Ver la hoja de datos (PDF) - Cypress Semiconductor
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CY7C1347D-166AC Datasheet PDF : 21 Pages
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CY7C1347D
Moving the controller to Shift-DR state then places the
boundary scan register between the TDI and TDO pins.
Because the PRELOAD portion of the command is not imple-
mented in this device, moving the controller to the Update-DR
state with the SAMPLE/PRELOAD instruction loaded in the
instruction register has the same effect as the Pause-DR
command.
BYPASS
When the BYPASS instruction is loaded in the instruction
register and the TAP controller is in the Shift-DR state, the
bypass register is placed between TDI and TDO. This allows
the board level scan path to be shortened to facilitate testing
of other devices in the scan path.
Reserved
Do not use these instructions. They are reserved for future
use.
1
TEST-LOGIC
RESET
0
0
REUN-TEST/ 1
IDLE
SELECT
1
DR-SCAN
0
1
CAPTURE-DR
1
SELECT
IR-SCAN
0
1
CAPTURE-IR
0
0
SHIFT-DR
0
SHIFT-IR
0
1
1
EXIT1-DR
1
EXIT1-IR
1
0
0
PAUSE-DR
0
PAUSE-IR
0
1
0
EXIT2-DR
1
1
0
EXIT2-IR
1
UPDATE-DR
1
0
Figure 1. TAP Controller State Diagram[8]
Note:
8. The 0/1 next to each state represents the value at TMS at the rising edge of TCK.
UPDATE-IR
1
0
Document #: 38-05022 Rev. *D
Page 8 of 21
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