isppac-powr1014 Lattice Semiconductor Corp., isppac-powr1014 Datasheet - Page 13

• Manufacturer Part Number: isppac-powr1014
• Description: In-system Programmable Power Supply Supervisor, Reset Generator And Sequencing Controller
• Manufacturer: Lattice Semiconductor Corp.

Lattice Semiconductor
Figure 2-5. Verify Timing Diagram
Figure 2-6. Discharge Timing Diagram
Theory of Operation
Analog Monitor Inputs
The ispPAC-POWR1014/A provides 10 independently programmable voltage monitor input circuits as shown in
Figure 2-7. Two individually programmable trip-point comparators are connected to an analog monitoring input.
Each comparator reference has 372 programmable trip points over the range of 0.672V to 5.867V. Additionally, a
75mV ‘zero-detect’ threshold is selectable which allows the voltage monitors to determine if a monitored signal has
dropped to ground level. This feature is especially useful for determining if a power supply’s output has decayed to
a substantially inactive condition after it has been switched off.
State
TCK
TMS
State
TCK
TMS
VIH
VIH
VIL
VIL
VIH
VIH
VIL
VIL
Update-IR
Update-IR
t
SU1
t
SU1
t
CKH
t
H
Run-Test/Idle (Erase or Program)
t
CKH
t
SU1
t
t
H
CKL
t
SU1
t
CKL
Run-Test/Idle (Program)
t
H
t
H
t
PWP
t
SU1
t
PWV
t
Select-DR Scan
CKH
t
SU1
t
H
2-13
Select-DR Scan
t
CKH
t
H
t
SU1
ispPAC-POWR1014/A Data Sheet
t
HVDIS
(Actual)
t
CKH
t
H
t
t
Run-Test/Idle (Verify)
SU1
SU1
t
CKL
t
CKH
Specified by the Data Sheet
t
CKH
t
H
Update-IR
t
H
t
PWV
t
SU1
t
CKL
t
Actual
SU1
t
PWV
t
CKH
t
H
t
CKH
t
H