Freescale Semiconductor 56F8037, User Manual, Page: 21 / 41

Debug LEDs
Technical Summary, Rev. 0
Freescale Semiconductor 2-3
Preliminary
. Table 2-2. SCI TxD Signal Options
JG4
Pin # Signal Description
1 GPIO Port B, Bit 7 TXD0
2 TxD To CP2102
3 GPIO Port C, Bit 8 TXD1
2.3 Debug LEDs
Six on-board Light-Emitting Diodes, (LEDs), are provided to allow real-time debugging for user
programs. These LEDs will allow the programmer to monitor program execution without having
to stop the program during debugging; refer to
Figure 2-1 . Table 2-3 describes the control of
each LED.
Setting GPIOA0, GPIOA1, GPIOA2, GPIOA3, GPIOA4, or GPIOA5 to a Logic One value will
turn on the associated LED.
56F8037
INVERTING BUFFER
GPIOA0
GPIOA1
GPIOA2
GREEN LED
YELLOW LED
RED LED
+3.3V
GREEN LED
YELLOW LED
RED LED
GPIOA3
GPIOA4
GPIOA5
Figure 2-1. Diagram of the Debug LED Interface