Intel 8XC196MH, 8XC196MD, 8XC196MC manual System using a clip-on emulator

SIGNAL DESCRIPTIONS

		Table B-6. Signal Descriptions (Continued)
Name	Type	Description
ONCE#	I	On-circuit Emulation
		Holding ONCE# low during the rising edge of RESET# places the device into
		on-circuit emulation (ONCE) mode. This mode puts all pins, except XTAL1 and
		XTAL2, into a high-impedance state, thereby isolating the device from other
		components in the system. The value of ONCE# is latched when the RESET#
		pin goes inactive. While the device is in ONCE mode, you can debug the
		system using a clip-on emulator.
		To exit ONCE mode, reset the device by pulling the RESET# signal low. To
		prevent inadvertent entry into ONCE mode, either configure this pin as an
		output or hold it high during reset and ensure that your system meets the VIH
		specification (see datasheet).
		ONCE# is multiplexed with P5.4.
P0.7:0	I	Port 0
		This is a high-impedance, input-only port. Port 0 pins should not be left floating.
		These pins may individually be used as analog inputs (ACHx) or digital inputs
		(P0.y). While it is possible for the pins to function simultaneously as analog and
		digital inputs, this is not recommended because reading port 0 while a
		conversion is in process can produce unreliable conversion results.
		ANGND and VREF must be connected for port 0 to function.
		Port 0 is multiplexed as follows: P0.0/ACH0, P0.1/ACH1, P0.2/ACH2,
		P0.3/ACH3, P0.4/ACH4/PMODE.0, P0.5/ACH5/PMODE.1,
		P0.6/ACH6/PMODE.2 (MC, MD), P0.6/ACH6/T1CLK/PMODE.2 (MH),
		P0.7/ACH7/PMODE.3 (MC, MD), and P0.7/ACH7/T1DIR/PMODE.3 (MH).
P1.4:0 (MC)	I	Port 1
P1.7:0 (MD)		This is a high-impedance, input-only port.
		On the 8XC196MC and MD, some port 1 pins may individually be used as
		analog inputs (ACHx) or digital inputs (P1.y). While it is possible for the pins to
		function simultaneously as analog and digital inputs, this is not recommended
		because reading port 1 while a conversion is in process can produce unreliable
		conversion results.
		ANGND and VREF must be connected for port 1 to function.
		Port 1 is multiplexed as follows: P1.0/ ACH8, P1.1/ACH9, P1.2/ACH10/T1CLK,
		P1.3/ACH11/T1DIR, P1.4/ACH12, and P1.5/ACH13).
		P1.6 and P1.7 are not multiplexed with any other signals. P1.7:5 are not
		implemented on the 8XC196MC.
P1.3:0 (MH)	I/O	Port 1
		This is a standard, bidirectional port that is multiplexed with individually
		selectable special-function signals.
		On the 8XC196MH, port 1 is multiplexed as follows: P1.0/ TXD0, P1.1/RXD0,
		P1.2/TXD1, and P1.3/RXD1.

B-17