User manual

Installation and Operation

2.5.1 The MCP9800

The MCP9800 comes with user-programmable registers that provide flexibility for tem-

perature-sensing applications. The register settings allow user-selectable 9-bit to 12-bit

temperature measurement resolution, configuration of the power-saving Shutdown and

One-Shot (single conversion on command while in Shutdown) modes and the specifi-

cation of both temperature alert output and hysteresis limits. When the temperature

changes beyond the specified limits, the MCP9800 outputs an alert signal. The user

has the option of setting the alert output signal polarity as an active-low or active-high

comparator output for thermostat operation, or as a temperature event interrupt output

for microprocessor-based systems.

This device has I

C/SMBus-compatible serial interface (refer to the MCP9800 data

sheet (DS21909) for further details).

2.5.2 The 24LC16B

The 24LC16B is a 16 Kbit Electrically Erasable PROM. This device has

C/SMBus-compatible serial interface. Low-voltage design permits operation down to

1.8V with standby and active currents of only 1μa and 1mA, respectively. The device

also has a page write capability for up to 16 bytes of data.

2.5.3 The MCP101

The MCP101 is a voltage supervisory device designed to keep a microcontroller in

Reset until the system voltage has reached the proper level and stabilized. It also

operates as protection from brown-out conditions when the supply voltage drops below

a safe operating level.