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JTAG Cable Connection
Use a JTAG cable (sold separately) to connect the evaluation board to your PC:
1. Connect external +5 V and GND power to pad locations J5 and J6 (Schematic Sheet 5 of 6).
2. Connect a JTAG cable from a JTAG source to the board's JTAG header (J3) (Schematic Sheet 5 of 6) on the
right side of the board.
See
Adding Support for a JTAG Cable and/or I
Board
section for information on how to modify the evaluation board to add a JTAG header connection.
Run the Processor Support Demo
The POWR607 Processor Support Demo illustrates key functions of the POWR607: voltage supervisor, reset gen-
erator, and watchdog timer (WDT). The block diagram of the processor support demo, Figure 3, shows the
POWR607 interface to a simulated processor/DSP. LEDs and switches are used to emulate the processor inter-
face.
Many processor power management scenarios can be shown with the POWR607 evaluation board. Follow the pro-
cedure below to emulate one particular case.
1. Set the POWR607 configuration to indicate 1.8 V Supply OK, disable reset pulse stretch and enable a two- sec-
ond watchdog timer period.
Select DIP Switch (1, 2, 3, 4) = 0010
Note: To indicate a logical 1, slide the switch towards the 1, 2, 3, or 4 numeral marks on the case. Select the
R16 Slider = 3.3 V position.
2. Press and then release the Reset push button.
The POWR607 Evaluation Board is reset. The CPU Reset LED (D2) lights to indicate the reset condition. The
WDT timer is reset and the two-second WDT count begins.
3. Press and release the WD_Trig push button.
The WDT_Trig signal is asserted by the processor/DSP. The POWR607 timer/counter is reset and the two- sec-
ond watchdog timer restarts.
Continue pressing the WD_Trig to "pet" the watchdog timer to prevent the two-second timeout.
4. Wait for two seconds and allow the WDT timer period to expire.
The POWR607 asserts the WDT_Intr output signal and the WDT_Interrupt LED (D11) lights momentarily to
indicate the interrupt condition.
In the next step you will increase the watchdog timer period from 2 seconds to 10 seconds and enable Reset
Pulse Stretch.
5. Select SW1 (1, 2, 3, 4) = 0101. Also select the R16 Slider = 3.3 V position. Press and release the Reset push
button on the POWR607 board.
The CPU Reset LED (D2) light indicates the reset condition. The WDT timer is reset and the 10-second WDT
count begins.
The following steps emulate a brown out condition of a 2.5 V supply rail output of a DC-to-DC converter (DC-
DC#2) monitored by the POWR607.
2
C Communications
in the
8
POWR607/6AT6 Evaluation Board
Modifying the POWR607/6AT6 Evaluation
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