Lattice Semiconductor POWR607 User Manual page 7

Setting
1 min WDT (SEL0=1, SEL1=1)
XX11
Enables a 1-minute period watchdog timer (WDT).
Disable Reset Pulse Stretch (RST=0)
X0XX
Disables the reset pulse stretch option of POWR607. A red LED D4 will light when RST=0.
Enable 200ms Reset Pulse Stretch (RST=1)
Appends an additional 200 ms period to any processor/DSP reset output asserted by the POWR607.
X1XX
Programmable clock and timer functions of the POWR607 allow for a variety of timeout intervals from 32
us to
stretch.
0XXX 1.8 V Supply OK (VM3=1.8)
Connects the 1.8V supply rail to the voltage monitor input (VMON3) of the POWR607.
This setting emulates a stable 1.8 V supply.
1XXX
1.8 V Supply Failure (VM3=High-Z)
Disconnects the 1.8 V supply rail from the voltage monitor input (VMON3) of the POWR607.
This setting emulates a DC-DC converter or other supply failure on the PCB. The POWR607 will assert
the Reset_CPU output signal to initiate a reset of the processor/DSP target device. A red LED (D2) will
light to indicate the power fail condition.
Push-button Switch
WD_Trig WDT Trigger
Press the push-button switch (WD_Trig) to emulate the watchdog timer reset trigger issued periodically
for normal operation by the processor/DSP.
Reset Manual Reset
Press the push-button switch (Reset) to assert a manual reset of the evaluation board. All timers of the
POWR607 will be cleared and the Reset_CPU output signal will be asserted.
Slide Potentiometer
R16 Voltage Supervisor Input
A slide potentiometer emulates the variability of a 2.5 V voltage rail on the PCB. Slide th
the 0.0 V
position to lower the voltage level input to the POWR607 voltage monitor (VMON2).
Connect to the POWR607/6AT6 Evaluation Board
To power and program the evaluation board you may use a PC USB port or use a combination of an external 5 V
power supply and a JTAG cable. If your PC does not provide a USB port, see
2
and/or I C Communications
USB Cable Connection
Use the USB cable provided to connect the evaluation board to your PC:
1. Connect the USB cable from a USB port on your PC to the board's USB mini-B socket (J1) on the bottom left
side of the board. After connection is made, a blue Power LED (PWR) will light up indicating the board is pow-
ered on.
2. If you are prompted, "Windows may connect to Windows Update" select No, not this time from available
options and click Next to proceed with the installation. Choose the Install from specific location (Advanced)
option and click Next.
3. Select Search for the best driver in these locations and click the Browse button to browse to the Windows
driver folder created in the Download Windows Hardware Drivers section. Select the CDM 2.04.06 WHQL Cer-
tified folder and click OK.
4. Click Next. A screen will display as Windows copies the required driver files. Windows will display a message
indicating that the installation was successful.
5. Click Finish to install the USB driver.
1.96 sec in 128 steps. It may be necessary to connect a logic analyzer to detect the pulse
in the Modifying the POWR607/6AT6 Evaluation Board
POWR607/6AT6 Evaluation Board
Function
7
e pot towards
Adding Support for a JTAG Cable
section.