mc33889 Freescale Semiconductor, Inc, mc33889 Datasheet - Page 29

• Manufacturer Part Number: mc33889
• Description: System Basis Chip With Low Speed Fault Tolerant Can Interface
• Manufacturer: Freescale Semiconductor, Inc

x101), stand-by debug (0001 x110), or Stop debug (0001
x111)
having to clear the W/D on a regular basis to facilitate
software and hardware debugging.
MCU FLASH PROGRAMMING CONFIGURATION
the application memory (MCU EEPROM or Flash), the SBC
allows the following capabilities: The VDD1 can be forced by
an external power supply to 5.0 V and the reset and WDOG
Analog Integrated Circuit Device Data
Freescale Semiconductor
Step 5) Write to the MCR register normal debug (0001
While in debug mode, the SBC can be used without
To facilitate the possibility of down loading software into
debug mode
VDD1
BATFAIL
VSUP
SPI
TIM1(step 3)
MCR(step4)
MCR (step5)
Figure 11. Debug Mode Enter
SPI: read batfail
SBC in debug Mode, no W/D
register.
read the BATFAIL bit (MCR read) and write 0000 into the
MCR.
output by external signal sources to zero or 5.0 V without
damage. This supplies the complete application board with
external power supply and applies the correct signal to the
reset pin.
Step 6) To leave the debug mode, write 0000 to the MCR
To avoid entering the debug mode after a power up, first
Figure 11
MCR (step6)
illustrates entering the debug mode.
SBC not in debug Mode and W/D on
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
33889
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