SUPEVKIT Maxim Integrated, SUPEVKIT Datasheet - Page 2

• Manufacturer Part Number: SUPEVKIT
• Description: Power Management IC Development Tools Programmers, Development Systems
• Manufacturer: Maxim Integrated
• Series: SUPEVKITr

Specifications of SUPEVKIT

• Factory Pack Quantity: 1

Before you begin, you will need the following equip-
ment:
Table 1 lists the features that can be emulated by the
SUPEVKIT. Refer to the corresponding device’s data
sheet to look up the specifications for these features.
To configure the supervisory circuit, take the following
steps:
1) Install jumpers JU2–JU5 in the positions listed in
2) Set the reset timeout period, referring to Table 2 to
3) If the selected supervisory circuit has a watchdog
4) Turn on the power supply and connect it to the volt-
5) Connect the power supply to the SUPEVKIT at the
6) Connect the voltmeter to the pads labeled TP and
7) Turn potentiometer R18 clockwise until the volt-
Supervisory Circuit Evaluation Kit
2
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•
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Table 1.
Example: For the MAX6320PUK33BX-T, the jumper
settings are JU2 = 2-3, JU3 = open, JU4 = closed,
and JU5 = closed.
determine which trace (if any) needs to be cut.
Example: For the MAX6320PUK33BX-T, the reset
timeout period is 20ms, so it is necessary to cut the
trace between C5 and C6.
timeout feature, consult Table 3 to determine which
capacitor value to use for C2 and which position to
use for jumper JU1.
Example: For the MAX6320PUK33BX-T, the watch-
dog timeout period is 71ms. Use a value of 0.039µF
for capacitor C2. Jumper JU1 should be in the 2-3
position.
meter. Set the power-supply voltage to the desired
reset threshold voltage. The accuracy of the trip
threshold is determined by the accuracy of the volt-
meter.
Example: For the MAX6320PUK33BX-T, set the
power supply to 3.30V.
pads labeled V
ates from +1V to +5.5V. The supply voltage must
not exceed +5.5V.
GND.
meter reading goes high (approximately equal to
V
clockwise until the voltmeter reading decreases
_______________________________________________________________________________________
CC
A 1V to 5.5V variable DC power supply
A voltmeter
A trimmer potentiometer adjustment tool (small
flat-blade screwdriver)
). Then slowly turn potentiometer R18 counter-
CC
and GND. The SUPEVKIT oper-
Quick Start
8) Connect the SUPEVKIT to the test circuit, using the
A watchdog circuit consists of an input (WDI) and an
output (RESET). If WDI is not toggled within the watch-
dog timeout period (which is a predetermined amount
of time), then a RESET is issued. Disable the watchdog
function by installing jumper JU3.
Capacitor C2 selects the watchdog timeout period. To
choose a value for this capacitor, refer to Table 3 or use
the following formula:
where t
is in pF.
The SUPEVKIT features two modes of watchdog timer
operation: normal mode and extended mode. In normal
mode (JU1 = 2-3), the formula shown above deter-
mines the watchdog timeout period. In extended mode
(JU1 = 1-2), the watchdog timeout (t
a factor of 500.
Note: In extended mode operation, leaving pad WDI
floating disables the watchdog feature.
The SUPEVKIT has five reset outputs: active-low
push/pull (RESET), active-low bidirectional (RESETBD),
active-low open-drain (RESETOD), active-high push/pull
(RESET), and active-high open-drain (RESETOD).
These outputs are valid down to V
timeout period is the amount of time RESET is asserted
after V
Capacitors C1, C5, C6, and C7 set the reset timeout
period. The SUPEVKIT comes with the period set at
1120ms. To change the period to either 1ms, 20ms, or
140ms, cut a PC board trace as specified in Table 2.
The bidirectional reset output of the SUPEVKIT is valid
only for reset threshold voltages down to 2.63V.
Potentiometer R18 sets the undervoltage reset thresh-
old. To enable the undervoltage reset feature, install the
jumpers in the positions specified in Table 4. Use a volt-
meter to set the power-supply voltage to the desired trip
to 0. The reset threshold voltage on the SUPEVKIT
is now set.
device inputs and outputs listed in Table 1.
Example: The MAX6320PUK33BX-T uses pads
WDI, and RESETOD.
CC
WD
rises above the reset threshold voltage.
is the watchdog timeout period in µs and C2
C2 = t
Detailed Description
WD
/ 2.67
Undervoltage Setup
Watchdog Circuit
CC
WD
Reset Outputs
) is multiplied by
= 1V. The reset
MR,