Specifications ispLSI 8840
Figure 8. Boundary Scan Waveforms and Timing Specifications
TMS
TDI
T
T
bth
btsu
T
T
T
btcp
btch
btcl
TCK
TDO
T
T
T
btoz
btvo
btco
Valid Data
Valid Data
T
T
btch
btcsu
Data to be
captured
Data Captured
T
T
T
btuoz
btuov
btuco
Data to be
driven out
Valid Data
Valid Data
SYMBOL
PARAMETER
MIN
0.1
0.05
0.05
25
MAX
UNITS
µs
t
t
t
t
t
t
t
t
t
t
t
t
t
t
btcp
TCK Clock Pulse Width
TCK Pulse Width High
TCK Pulse Width Low
400
200
200
—
btch
btcl
µs
µs
btsu
bth
TDI, TMS Setup Time to TCK
TDI, TMS Hold Time from TCK
ns
25
—
ns
rf
TCK, TDI, TMS Rise and Fall Time
TAP Controller, TCK to TDO Valid
50
—
mV/ns
ns
btco
btoz
btvo
btcsu
btch
—
25
25
25
—
TAP Controller, TCK to TDO High-Impedance
—
ns
TAP Controller, TCK to TDO High-Impedance to Valid Output
BSCAN Test Capture Register Setup Time
—
ns
20
ns
BSCAN Test Capture Register Hold Time
25
—
ns
btuco
btuoz
btuov
BSCAN Test Update Register Clock to Valid Output
BSCAN Test Update Register Clock to High-Impedance
BSCAN Test Update Register High-Impedance to Valid Output
—
—
—
25
25
25
ns
ns
ns
Table 2-0010/8840
10
LATTICE [ LATTICE SEMICONDUCTOR ]
