56F8167 datasheet(38/182 Pages) FREESCALE

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56F8367 Technical Data, Rev. 9

Freescale Semiconductor

Preliminary

EXTBOOT

124

B11

Schmitt

Input

Input,

pull-up

enabled

External Boot — This input is tied to VDD 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

159

Schmitt

Input

Input,

pull-up

enabled

External Memory Mode — This input is tied to VDD in order to

enable an extra four address lines, for a total of 20 address lines

out of reset. 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 160-Pin LQFP and MBGA (Continued)

Signal

Name

No.

Ball No.

Type

State

During

Reset

Signal Description

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