PAC80 Lattice Semiconductor Corp., PAC80 Datasheet - Page 5

• Manufacturer Part Number: PAC80
• Description: In-system Programmable Analog Circuit
• Manufacturer: Lattice Semiconductor Corp.

T
*Note: During device JTAG programming, analog output response will deviate from expected behavior. This is because all
configuration information is erased and then re-written as part of a normal programming cycle, momentarily changing device filter
and gain parameters. Behavior will deviate from that expected during both of these steps since the analog outputs are not clamped
during a programming cycle. During erase, a drop in the filter corner frequency and an automatic change to the 10X gain setting
can be expected (80ms minimum by specification) and will continue until bits go to there final state after a JTAG write command
is issued (less than 2ms later, though the write cycle must still be maintained for a full 80ms to achieve specified data retention).
TCK
TMS
TDI
TDO
Timing Specifications (JTAG Interface Mode)
Dynamic Performance
A
Symbol
tpwcal1
tpwcal2
tcalmin
tckmin
= 25 C; V
tdozx
tdoxz
tmss
tmsh
tpwp
tpwe
tckh
tdov
tdis
tdih
tckl
tmss
tdis
S
Minimum Clock Period
TCK High Time
TCK Low Time
TMS Setup Time
TMS Hold Time
TDI Setup Time
TDI Hold Time
TDO Float to Valid Delay
TDO Valid Delay
TDO Valid to Float Delay
Time for a programming operation
Time for an erase operation
Time for auto-cal operation on power-up
Minimum auto-cal pulse width
Time for user initiated auto-cal operation
tdozx
= +5.0V (Unless otherwise specified)
tmsh
tdih
tckh
Parameter
tdov
tckl
tckmin
tdoxz
Automatically executed at power-up
Executed on rising edge of CAL
Executed in Run-Test/Idle
Executed in Run-Test/Idle
5
TCK
TMS
CAL
V OUT
Condition
tmss
Specifications ispPAC80
tcalmin
*(PRGUSR/UBE executed in
Run-Test/Idle state)
tpwcal1, tpwcal2
V
OUT
tpwp, tpwe
(Note: CAL internally
initiated at device turn-on.)
Min.
200
= 0V
50
50
15
10
15
10
80
80
40
DIFF
Typ.
tmss
Max.
100
100
250
100
60
60
60
Units
ms
ms
ms
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns