Specifications ispLSI 1048EA
3
USE
ispMA
CH
4A5
FOR
NEW
5V
DESIGNS
Symbol
Parameter
Min
Max
Units
tbtcp
TCK [BSCAN test] clock pulse width
100
–
ns
tbtch
TCK [BSCAN test] pulse width high
50
–
ns
tbtcl
TCK [BSCAN test] pulse width low
50
–
ns
tbtsu
TCK [BSCAN test] setup time
20
–
ns
tbth
TCK [BSCAN test] hold time
25
–
ns
trf
TCK [BSCAN test] rise and fall time
50
–
mV/ns
tbtco
TAP controller falling edge of clock to valid output
–
25
ns
tbtoz
TAP controller falling edge of clock to data output disable
–
25
ns
tbtvo
TAP controller falling edge of clock to data output enable
–
25
ns
tbtcpsu
BSCAN test Capture register setup time
40
–
ns
tbtcph
BSCAN test Capture register hold time
25
–
ns
tbtuco
BSCAN test Update reg, falling edge of clock to valid output
–
50
ns
tbtuoz
BSCAN test Update reg, falling edge of clock to output disable
–
50
ns
tbtuov
BSCAN test Update reg, falling edge of clock to output enable
–
50
ns
Figure 2. Boundary Scan Waveforms and Timing Specifications
TMS
TDI
TCK
TDO
Data to be
captured
Data to be
driven out
Valid Data
Data Captured
btsu
T
bth
T
btcl
T
btch
T
btcp
T
btvo
T
btco
T
btoz
T
btcpsu
T
btcph
T
btuov
T
btuco
T
btuoz
T
Boundary Scan