5.20 CON14 Signal Multiplex
Pin Number
Signal Name
Multiplex Modes
[1]
ALT0
ALT1
ALT2
ALT5
ALT6
1
+3.3V_IO
2
GND
3
EXT_IO22
GPIO1_2
PWMO4
I2C2_SCL
CSPI1_SS2
CAN2_TX
4
EXT_IO23
GPIO1_3
I2C2_SDA
CAN2_RX
[1]
For details on the multiplex modes of the i.MX257, please refer to the "i.MX25 Multimedia Applications Processor Reference Manual" stored in the /
document/datasheet directory on the included DVD.
5.13. LED1, LED2 (LAN LEDs)
LED1 and LED2 are the LAN interface status LEDs. They are shown on the upper part of CON2.
5.21 LAN LED Meanings
LED
Name (color)
On
Off
LED1
Link LED (green)
A LAN cable is connected and a
10BASE-T or 100BASE-TX link has
been established.
A LAN cable is not connected or the
LAN status of the connected device
is not active.
LED2
Activity LED (yellow)
Data transmit/receive
No data
5.14. LED3, LED4, LED5 (User LEDs)
LED3, LED4 and LED5 are LEDs which can be used freely by the user. They can be controlled once the i.MX257 signals
to which the LEDs are connected to are set to GPIO output mode.
5.22 User LED Functions
LED
Name (color)
Function
LED3
User LED (red)
Connected to NFALE (GPIO3_28) pin on i.MX257
(low: off, high: on)
LED4
User LED (green)
Connected to NFCLE (GPIO3_29) pin on i.MX257
(low: off, high: on)
LED5
User LED (yellow)
Connected to BOOT_MODE0 (GPIO4_30) pin on i.MX257
(low: off, high: on)
LED5 is connected to the same signal as JP1. LED5 cannot be controlled while JP1
is shorted.
5.15. SW1 (User Switch)
SW1 is a switch which can be freely used by the user. The switch status can be obtained once the i.MX257 signal it is
connected to is set to GPIO input mode.
Armadillo-400 Series Hardware Manual
Interface Specifications
30
