Microchip Technology DM164123 Data Sheet
PICDEM™ System Management User’s Guide
DS41304B-page 8
©
2007 Microchip Technology Inc.
1.4
PICDEM SYSTEM MANAGEMENT LAYOUT
1.4.1
Board Features
The PICDEM™ System Management board is populated with a PIC16F886
microcontroller. The PIC16F886 connects to the following board features:
microcontroller. The PIC16F886 connects to the following board features:
• MCLR switch, interrupt switch
• 4 LEDs
• I
2
C
™
communications (SDA and SCL)
• USART communications (TX and RX)
• ICSP™ programming pins (ICSPDAT and ICSPCLK)
• PWM output fan control
• Fan tachometer input line
• Heating element control line
• Temperature sensor input line from MCP9700
• 32.768 kHz crystal clock (T1OSO and T1OSI)
• Battery voltage measurement enable, input line and interrupt-on-change pin
1.4.2
Board Connections
The PICDEM™ System Management is populated with connectors for programming,
communications, and fan control and a temperature sensor, shown in Figure 1-1. A
description of the connectors and the temperature sensor is described below.
communications, and fan control and a temperature sensor, shown in Figure 1-1. A
description of the connectors and the temperature sensor is described below.
FIGURE 1-1:
PICDEM™ SYSTEM MANAGEMENT BOARD
PICkit
TM
2 ICSP
TM
Connector
PICkit
TM
Serial
Analyzer Connector
Three-Wire
Fan Connector
Fan Connector
Four-Wire
Fan Connector
Fan Connector
Temperature
Sensor
Sensor
Two-Wire
Fan Connector
Fan Connector