3-17
DC and Switching Characteristics
Lattice Semiconductor MachXO Family Data Sheet
Flash Download Time
JTAG Port Timing Specifications
Figure 3-5. JTAG Port Timing Waveforms
Symbol Parameter Min. Typ. Max. Units
t
REFRESH
Minimum V
CC
or V
CCAUX
(later of the two supplies)
to Device I/O Active
LCMXO256 — — 0.4 ms
LCMXO640 — — 0.6 ms
LCMXO1200 — — 0.8 ms
LCMXO2280 — — 1.0 ms
Symbol Parameter Min. Max. Units
f
MAX
TCK [BSCAN] clock frequency — 25 MHz
t
BTCP
TCK [BSCAN] clock pulse width 40 — ns
t
BTCPH
TCK [BSCAN] clock pulse width high 20 — ns
t
BTCPL
TCK [BSCAN] clock pulse width low 20 — ns
t
BTS
TCK [BSCAN] setup time 8 — ns
t
BTH
TCK [BSCAN] hold time 10 — ns
t
BTRF
TCK [BSCAN] rise/fall time 50 — mV/ns
t
BTCO
TAP controller falling edge of clock to output valid — 10 ns
t
BTCODIS
TAP controller falling edge of clock to output disabled — 10 ns
t
BTCOEN
TAP controller falling edge of clock to output enabled — 10 ns
t
BTCRS
BSCAN test capture register setup time 8 — ns
t
BTCRH
BSCAN test capture register hold time 25 — ns
t
BUTCO
BSCAN test update register, falling edge of clock to output valid — 25 ns
t
BTUODIS
BSCAN test update register, falling edge of clock to output disabled — 25 ns
t
BTUPOEN
BSCAN test update register, falling edge of clock to output enabled — 25 ns
Rev. A 0.19
TMS
TDI
TCK
TDO
Data to be
captured
from I/O
Data to be
driven out
to I/O
ataD dilaVataD dilaV
ataD dilaVataD dilaV
Data Captured
t
BTCPH
t
BTCPL
t
BTCOEN
t
BTCRS
t
BTUPOEN
t
BUTCO
t
BTUODIS
t
BTCRH
t
BTCO
t
BTCODIS
t
BTS
t
BTH
t
BTCP