PAC-POWR607-EV Lattice, PAC-POWR607-EV Datasheet - Page 11

• Manufacturer Part Number: PAC-POWR607-EV
• Description: MCU, MPU & DSP Development Tools ispPAC POWR607 EVAL BRD
• Manufacturer: Lattice
• Series: ispPAC®r

Specifications of PAC-POWR607-EV

• Processor To Be Evaluated: ispPAC-POWR607
• Interface Type: JTAG
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 3.96 V
• Core Architecture: CPLD
• Main Purpose: Power Management, Power Supply Supervisor/Tracker/Sequencer
• Embedded: Yes, Other
• Utilized Ic / Part: ispPAC-POWR607
• Primary Attributes: -
• Secondary Attributes: 4.5 ~ 9 V Supply
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Lattice Semiconductor
Each comparator outputs a HIGH signal to the PLD array if the voltage at its positive terminal (VMONx pin) is
greater than its programmed trip point setting, otherwise it outputs a LOW signal.
A hysteresis of approximately 1% of the setpoint is provided by the comparators to reduce false triggering as a
result of input noise. The hysteresis provided by the voltage monitor is a function of the input divider setting.
Table 4-3 lists the typical hysteresis versus voltage monitor trip-point.
Programmable Over-Voltage and Under-Voltage Thresholds
Figure 4-9 (a) shows the power supply ramp-up and ramp-down voltage waveforms. Because of hysteresis, the
comparator outputs change state at different thresholds depending on the direction of excursion of the monitored
power supply.
Figure 4-9. (a) Power Supply Voltage Ramp-up and Ramp-down Waveform and the Resulting Comparator
Output, (b) Corresponding to Upper and Lower Trip Points
During power supply ramp-up the comparator output changes from logic 0 to 1 when the power supply voltage
crosses the upper trip point (UTP). During ramp down the comparator output changes from logic state 1 to 0 when
the power supply voltage crosses the lower trip point (LTP). To monitor for over voltage fault conditions, the UTP
should be used. To monitor under-voltage fault conditions, the LTP should be used.
Tables 1 and 2 show both the under-voltage and over-voltage trip points, which are automatically selected in soft-
ware depending on whether the user is monitoring for an over-voltage condition or an under-voltage condition.
Comparator Logic Output
UTP
4-11
LTP
ispPAC-POWR607 Data Sheet
(a)
(b)