i.MX35 Applications Processors for Automotive Products, Rev. 10
Freescale Semiconductor
19
Assuming the i.MX35 chip is already fully powered; it is still possible to reset all of the modules to their
default reset by asserting POR_B for at least 4 CKIL cycles and later de-asserting POR_B. This method
of resetting the i.MX35 can also be supported by tying the POR_B and RESET_IN_B pins together.
Figure 3. Timing Between POR_B and CKIL for Complete Reset of i.MX35
4.4.2
System Reset
System reset can be achieved by asserting RESET_IN_B for at least 4 CKIL cycles and later negating
RESET_IN_B. The following modules are not reset upon system reset: RTC, PLLs, CCM, and IIM.
POR_B pin must be deasserted all the time.
Figure 4. Timing Between RESET_IN_B and CKIL for i.MX35 System Reboot
4.5
Power Characteristics
The table shows values representing maximum current numbers for the i.MX35 under worst case voltage
and temperature conditions. These values are derived from the i.MX35 with core clock speeds up to
532 MHz. Common supplies have been bundled according to the i.MX35 power-up sequence
requirements. Peak numbers are provided for system designers so that the i.MX35 power supply
requirements will be satisfied during startup and transient conditions. Freescale recommends that system
current measurements be taken with customer-specific use-cases to reflect normal operating conditions in
the end system.
POR_B
CKIL
At least 4 CKIL cycles
RESET_IN_B
CKIL
At least 4 CKIL cycles