User`s manual

EM-1240 Hardware User’s Manual EM-1240 Functionality
DTR_Console (RS-232) 43 44 DCD_Console (RS-232)
GND 45 46 GND
Serial LED_Tx0 47 48 Serial LED_Rx0
Serial LED_Tx1 49 50 Serial LED_Rx1
Serial LED_Tx2 51 52 Serial LED_Rx2
Serial LED_Tx3 53 54 Serial LED_Rx3
GND 55 56 GND
Definition of SD Signals
The following table gives the definition of the SD signals. Note that the signal pins from the JP3
pin header share the same pin as the GPIO.
Signal Name Direction GPIO Description
SD_CLK Output GPIO 7 Clock signal to SD/MMC
SD_CMD Bidirectional GPIO 2 Bidirectional line for command and response
SD_DAT<3:0> Bidirectional GPIO <6:3> Bidirectional line for read and write data
SD_CD Input GPIO 1 Card detect
SD_WP Input GPIO 0 Write protect
Mechanical Specifications of Pin Header Dimensions
Refer to the following figures for the mechanical specifications of the Pin Header dimensions of
the EM-1240 Embedded Module. The figures define the mechanical specifications of jumpers JP3
and JP4 on the EM-1240.
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