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14-11
SPECIAL OPERATING MODES
Holding the ONCE# signal low during the rising edge of RESET# causes the device to enter
ONCE mode. To prevent accidental entry into ONCE mode, we highly recommend configuring
this pin as an output. If you choose to configure this pin as an input, always hold it high during
reset and ensure that your system meets the V
IH
specification (see datasheet) to prevent inadvert-
ent entry into ONCE mode.
Exit ONCE mode by asserting the RESET# signal and allowing the ONCE# pin to float or be
pulled high. Normal operations resume when RESET# goes high.
14.6 RESERVED TEST MODES
A special test-mode-entry pin (P2.6) is provided for Intel’s in-house testing only. These test
modes can be entered accidentally if you configure the test-mode-entry pin as an input and hold
it low during the rising edge of RESET#. To prevent accidental entry into an unsupported test
mode, we highly recommend configuring the test-mode-entry pin as an output. If you choose to
configure this pin as an input, always hold it high during reset and ensure that your system meets
theV
IH
specification (see datasheet) to prevent inadvertent entry into an unsupported test mode.