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Evaluate: MAX6884/MAX6885

MAX6884 Evaluation System/

Evaluation Kit

mal, or hexadecimal. Hexadecimal numbers should be

prefixed by $ or 0x. Binary numbers must be exactly eight

digits. See Figure 7 for an example of this tool.

Note: In places where the slave address asks for an 8-bit

value, it must be the 7-bit slave address of the MAX6884

as determined by ADD, with the last bit set to 1 for a read

operation or a zero for a write. Refer to the MAX6884 data

sheet for a complete list of registers and functions.

Detailed Description of Hardware

The MAX6884 (U1) is surrounded by breakout header

pins J1–J4. The user power-supply inputs IN1–IN6 are

bypassed by capacitors C1–C6. Apply a 3.3V LED sup-

supply (optional) to the VCC and GND pads. Monitor the

MAX6884 outputs at the RESET, UV/OV, and WDO pads.

Apply a watchdog timer input at the WDI pad. A pushbut-

ton switch (SW1) controls the manual reset input.

Address Selection

default address is 1010 01XY (ADD = GND). See Table 1

for a complete list of addresses.

Note: The first 7 bits shown are the address. Y (bit 0) is

or a zero for a write.

Figure 7. The above example shows a simple SMBusWriteByte operation using the included 2-Wire Interface Diagnostics. In this

example, the software is writing data (0x12) to Device Address 0xA4, Register Address 0x00. This will set the primary undervoltage

threshold for IN1A.

X = Don’t care (refer to MAX6884 data sheet for more details).

*Default configuration: JU4 (2-3).

(JU4)

SHUNT

POSITION

MAX6884

ADDRESS

PIN

MAX6884 ADDRESS

BINARY

HEXADECIMAL

1-2

VCC

1010 01XY

0xA4 or 0xA6

2-3*

GND

1010 00XY

0xA0 or 0xA2