Digi NS9210 - Manual (Page 45)

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Serial status
LEDs
The development board has two sets of serial port LEDs — four for serial port D and
eight for serial port B. The LEDs are connected to the TTL side of the RS232 or
RS422/485 transceivers.
„
Green means corresponding signal high.
„
Red means corresponding signal low.
„
The intensity and color of the LED will change when the voltage is switching.
Status LEDs
Serial Port D
LEDs
Status LEDs
Serial Port B
LEDs
Signal name LED GPIO used
USER_LED1# LE5 GPIO82
USER_LED2# LE6 GPIO85
LED reference Function
RED GREEN
LE60 LE45 CTSD#/GPIO60
LE61 LE46 RTSD#/GPIO64
LE62 LE47 RXDD/GPIO62
LE63 LE48 TXDD/GPIO66
LED reference Function
RED GREEN
LE64 LE49 DCDB#/GPIO51
LE65 LE50 RIB#/GPIO55
LE66 LE51 DSRB#/GPIO53
LE67 LE52 DTRB#/GPIO57
LE68 LE53 CTSB#/GPIO52
LE69 LE54 RTSB#/GPIO56
LE70 LE55 RXDB/GPIO54
LE71 LE56 TXDB/GPIO58