Datasheet

Signal Pins
56F8356 Technical Data, Rev. 13
Freescale Semiconductor 37
Preliminary
EXTBOOT 112 Schmitt
Input
Input,
pull-up
enabled
External Boot — This input is tied to V
DD
to force the device to
boot from off-chip memory (assuming that the on-chip Flash
memory is not in a secure state). Otherwise, it is tied to ground.
For details, see Table 4-4.
Note: When this pin is tied low, the customer boot software should
disable the internal pull-up resistor by setting the XBOOT bit of the
SIM_PUDR; see Part 6.5.6.
EMI_MODE 143 Schmitt
Input
Input,
pull-up
enabled
External Memory Mode — The EMI_MODE input is internally tied
low (to V
SS
). This device will boot from internal flash memory
under normal operation. This function is also affected by
EXTBOOT and the Flash security mode. For details, see
Table 4-4.
If a 20-bit address bus is not desired, then this pin is tied to
ground.
Note: When this pin is tied low, the customer boot software should
disable the internal pull-up resistor by setting the EMI_MODE bit of
the SIM_PUDR; see Part 6.5.6.
Table 2-2 Signal and Package Information for the 144-Pin LQFP (Continued)
Signal Name Pin No. Type
State
During
Reset
Signal Description