DSP56858EVM User Manual, Rev. 3
2-8
Freescale Semiconductor
2.6 Operating Mode
The 56858EVM provides a boot-up MODE selection switch, S4. This switch is used to select the
operating mode of the controller as it exits RESET. Refer to the DSP56858 User’s Manual for a
complete description of the chip’s operating modes.
Table 2-3
shows the two operation modes
available on the 56858.
Table 2-3. Operating Mode Selection
Operating Mode
S4 (ON)
Comment
0
1–2, 3-4 & 5-6
Bootstrap from External byte-wide memory
1
3-4 & 5-6
Bootstrap from SPI
2
1-2 & 5-6
Normal Expanded mode
3
5-6
Development Expanded mode
4
1-2 & 3-4
Host Interface Port Single Strobe mode
5
3-4
Host Interface Port Dual Strobe mode
2.7 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 2-6
.
Table 2-4
describes the control of
each LED.
Table 2-4. LED Control
Controlled by
User LED
Port
Signal
LED1
Port D
PD0
LED2
Port D
PD1
LED3
Port D
PD2
LED4
Port D
PD3
LED5
Port D
PD4
LED6
Port D
PD5
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