Freescale Semiconductor M5211DEMO, Руководство пользователя

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Demonstration Board for Freescale MCF5211, Rev. 1
User Options
Freescale Semiconductor 14
Figure 10. COM Connector
11.3 SPI Port
SPI signaling connects directly between connector J1 and the MCU. Refer to the MCF5213 Integrated
Microcontroller Reference Manual for details on using the SPI interface.
11.4 IIC Port
IIC signaling connects directly between connector J1 and the MCU. Refer to the MCF5213 Integrated
Microcontroller Reference Manual for details on using the IIC interface.
12 User Options
The M5211DEMO includes various input and output devices to aid application development. User I/O
devices include two momentary pushbutton switches, four green LEDs, and one potentiometer.
12.1 Pushbutton Switches
Two pushbutton switches provide momentary, active-low input, for user applications. Pull-ups internal to
the MCU must be enabled to provide error free switch operation. Pushbutton switches SW1 and SW2 are
connected to MCU I/O ports IRQ4* and IRQ7* respectively.
12.2 LED Indicators
Indicators LED1 through LED4 are enabled by the LED_EN option header, shown in Figure 11 . Each
LED is active-high and illuminates when a logic high signal is driven from the respective MCU I/O port.
A 3S buffer between the MCU port and the user LEDs provides the drive current necessary to control the
LEDs.
Figure 11. LED_EN Option Header
Female DB9 connector that interfaces to the ColdFire
internal SCI1 serial port via the RS232 transceiver.
Pins 1, 4, and 6 are connected together.
1, 4
RTS
CTS
NC
1
2
3
4
5
6
7
8
9
4, 6
TXD
RXD
1, 6
GND
User LEDs enabled active-high
LED_EN
User LEDs disabled
ON
LED_EN
OFF