MCS3142 datasheet(24/57 Pages) MICROCHIP

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Embedded Security Development Board

 2014 Microchip Technology Inc.

DS40001746A-page 23

5.4

USB INTERFACE PORT

The Microchip MCP2200 provides USB to UART support. The USB interface port can

also be used to power the Embedded Security Development Board directly. Please see

Section 8.2 “Installation” for more information about connecting the board to a PC.

5.5

PICtail™ PORT

The PICtail port is a 28-pin interface port that supports Microchip’s RF-based daughter

cards. The PICtail port provides the following interfaces to the daughter cards:

• Power Supply

• SPI interface

• Interrupt request lines

• Other digital/analog I/O lines

There are many Microchip accessory daughter cards, which have PICtail port

connectivity. When not used as one of the components in the Wireless Security Remote

Control Development Kit, the Embedded Security Development Board can be

connected with any daughter board with the PICtail port, and perform different

functionalities. Refer to the Microchip web site http://www.microchip.com for accessory

daughter boards with PICtail port.

5.6

LCD DISPLAY

The Embedded Security Development Board supports 16x2 character LCD display

with backlight. The LCD is controlled by the host microcontroller through the SPI port.

5.7

REAL-TIME CLOCK AND CALENDAR (RTCC) MODULE

The Embedded Security Development Board RTCC module can be used to set and

track clock and calendar precisely. The RTCC functionality is achieved with the

Microchip MCP795W10. The RTCC module is controlled by the host microcontroller

through the SPI interface. The RTCC is commonly used with Ultimate KEELOQ, which

relies on the system clock as part of its security.

The RTCC module can be powered either by the 3.3V power from the Embedded

Security Development Board, or by a separate coin battery when external power is not

available. For details on operating this RTCC module, refer to the data sheet of the

MCP795W10 at http://www.microchip.com/MCP795W10.

Note: The user must be careful about the PICtail port pins that share different

functions of the board. The user needs to check the schematics before

assigning functions for any port pin.

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