MCS3142 datasheet(23/57 Pages) MICROCHIP

23 / 57 page

MCS3142 Dual KEELOQ® Encoder Wireless Remote Control Development Kit User’s Guide

DS40001746A-page 22

 2014 Microchip Technology Inc.

5.2

SERIAL COMMUNICATIONS CONNECTIONS

The Embedded Security Development Board is divided into two halves. The left side is

the host controller half. The right side is the target application half. The two halves are

connected by three wires, easily accessible by test points, labeled TP1, TP2 and TP3.

Table 5-2 lists the respective microcontroller I/O port connections:

The host side half is controlled by a PIC16LF1947 microcontroller. The PIC16LF1947

microcontroller communicates with a 16x2 character LCD display (LCD1), an

MCP2200 USB to UART communications IC (U2), an MCP795W10 SPI Real-Time

Clock Calendar IC (U5), four push button switches (SW5-SW8), and seven LEDs

(D8-D14). The PIC16LF1947 microcontroller can be programmed and debugged via

the ICSP™ header (J4).

The target application half has a PIC16LF1938 microcontroller. The PIC16LF1938

microcontroller communicates with the 28-pin PICtail connector (J1), the Serial

Accessory Port (P20), four push button switches (SW1-SW4), and four LEDs (D4-D7).

The PIC16LF1938 microcontroller can be programmed/debugged via the ICSP (J5).

The Embedded Security Development Board schematic is shown in Appendix

C. “Embedded Security Development Board Schematics” as Figure C-2.

5.3

SERIAL ACCESSORY PORT (P20)

The Serial Accessory Port provides a simple serial interface for the external modules.

These modules may be either an external sensor or an accessory board. The partial

list of Microchip boards with SAP capabilities includes the following:

• LCD Serial Accessory Board

• RS-232 Serial Accessory Board

For more information about the existing accessory boards, visit

http://www.microchip.com or refer to the “RS-232 Serial Accessory Board User’s

Guide” (DS70649). The following interfaces are supported by the Serial Accessory

Port:

• 3 or 4-wire SPI

•I2C™

•USART

Jumpers J7 and J8 connect pull-up resistors, typically useful when I2C is selected and

the pull-up resistors are not available on the daughter board.

TABLE 5-2:

SERIAL CONNECTIONS BETWEEN DEVICES

Host Controller MCS3142

Test Points

Target Application

PIC16LF1947 (Master)

RF5

TP1

RB7/ICSPDAT

RB2

TP2

RB6/ICSPCLK

RF4

TP3

RE3/MCLR/VPP

MCS3142 数据表(PDF) 23 Page - Microchip Technology

MCS3142 数据表(HTML) 23 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57

数据表下载