MCIMX357CVM5B Freescale, MCIMX357CVM5B Datasheet - Page 18

• Manufacturer Part Number: MCIMX357CVM5B
• Manufacturer: Freescale

Specifications of MCIMX357CVM5B

• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

4.4.1
POR_B is normally connected to a power management integrated circuit (PMIC). The PMIC asserts
POR_B while the power supplies are turned on and negates POR_B after the power up sequence is
finished. See
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.
4.4.2
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.
4.5
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
18
•
System Reset (using the RESET_IN_B pin)
POR_B
CKIL
RESET_IN_B
CKIL
Power Characteristics
Power On Reset
System Reset
Figure
Figure 4. Timing Between RESET_IN_B and CKIL for i.MX35 System Reboot
Figure 3. Timing Between POR_B and CKIL for Complete Reset of i.MX35
i.MX35 Applications Processors for Industrial and Consumer Products, Rev. 9
2.
At least 4 CKIL cycles
At least 4 CKIL cycles
Freescale Semiconductor