CYF0018V_13 Datasheet, PDF (14/36 Pages) Cypress Semiconductor – 18/36/72-Mbit Programmable FIFOs

CYF0018V
CYF0036V
CYF0072V
JTAG Operation
CYFX072V has two devices connected internally in a JTAG chain as shown in Figure 4
Figure 4. Device Connection in a JTAG Chain
TRST
TMS
TCK
TMS
TCK
device1
TDI
TDO
TMS TRST
TCK
device2
TDI
TDO
TDI
TDO
Table 6 shows the IR register length and device ID
Table 6. JTAG IDCODES
Device-1
Device-2
IR Register Length
3
8
Device ID (HEX)
“Ignore”
1E3261CF
Bypass Register Length
1
1
Table 7. JTAG Instructions for Device-1
Device-1
Opcode (Binary)
BYPASS
111
Table 8. JTAG Instructions for Device-2
Device-2
EXTEST
HIGHZ
Opcode (HEX)
00
07
SAMPLE/PRELOAD
01
BYPASS
FF
IDCODE
0F
Document Number: 001-53687 Rev. *M
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