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 VIH 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

Aspecial 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 theVIH specification (see datasheet) to prevent inadvertent entry into an unsupported test mode.

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Intel 8XC196MD, 8XC196MH, 8XC196MC manual Reserved Test Modes