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ACT
Green
LED_ACT
ON – Link Active, TX or RX
NOTE: The Ethernet port must be initialized and active for status indications.
Accelerometer
The AP52233SLK applies an MMA7260Q, 3-axis accelerometer for tilt and motion-sense
applications. The accelerometer supports 4 user selectable sensitivities - 1.5g / 2g / 4g / 6g.
Separate (X/Y/Z) axis readings are routed to the MCU through the ACC_EN option header. A
SLEEP* input allows the device to be placed in a low-power mode.
An option header at ACC_EN allows the user to disconnect the accelerometer if necessary. In
default configurations, this option header is not installed and a cut-traces located on the bottom
of the board provide a signal path. To disconnect the accelerometer, simply open the cut-trace
and install a 1x3 pin-header at ACC_EN. Install a shunt on each signal to reconnect the
accelerometer. Table 4 below shows the signal connections to the MCU.
Table 4: ACC_EN Option Header
SIGNAL
X
Y
Z
MCU INPUT
AN4
AN5
AN6
In default configuration, this option header is not
installed. Cut-traces on the bottom of the PCB provide
signal pathways. To isolate these analog inputs, simply
open the cut-traces and install a 2x3, 0.1” pin header.
USER OPTIONS
The AP52233SLK includes various input and output devices to aid application development.
User I/O devices include 12 pushbutton switches, 4 green LEDs, and 1 potentiometer. The
table below summarizes user option connections on the development board.
Table 5: User Option Connections
OPTION
SW1
SW2
LED1
LED2
LED3
LED4
RV1
MCU_PORT
IRQ4
IRQ7
DTIN0
DTIN1
DTIN2
DTIN3
AN0
MCU_PIN
57
58
22
23
18
19
25
Pushbutton Switches
Two push button 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.
14
Freescale Semiconductor
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