Intel 8XC196NT, 87C196CB user manual Default Conditions, Table A-4. Definition of Status Symbols

87C196CB Supplement

		Table A-3. Signal Descriptions (Continued)
Name	Type	Description
WRL#	O	Write Low†
		During 16-bit bus cycles, this active-low output signal is asserted for low-byte
		writes and word writes. During 8-bit bus cycles, WRL# is asserted for all write
		operations.
		WRL# is multiplexed with P5.2, SLPWR#, and WR#.
		† The chip configuration register 0 (CCR0) determines whether this pin
		functions as WR# or WRL#. CCR0.2 = 1 selects WR#; CCR0.2 = 0 selects
		WRL#.
XTAL1	I	Input Crystal/Resonator or External Clock Input
		Input to the on-chip oscillator and the internal clock generators. The internal
		clock generators provide the peripheral clocks, CPU clock, and CLKOUT
		signal. When using an external clock or crystal instead of the on-chip oscillator,
		connect the clock input to XTAL1. The external clock signal must meet the VIH
		specification for XTAL1 (see datasheet).
XTAL2	O	Inverted Output for the Crystal/Resonator
		Output of the on-chip oscillator inverter. Leave XTAL2 floating when the design
		uses a external clock source instead of the on-chip oscillator.

A.3 DEFAULT CONDITIONS

Table A-5 lists the default functions of the I/O and control pins of the microcontroller with their values during various operating conditions. Table A-4 defines the symbols used to represent the pin status. Refer to the DC Characteristics table in the datasheet for actual specifications for VOL, VIL, VOH, and VIH.

Table A-4. Definition of Status Symbols

Symbol Definition

0Voltage less than or equal to VOL, VIL

1Voltage greater than or equal to VOH, VIH

HiZ	High impedance
LoZ0	Low impedance; strongly driven low
LoZ1	Low impedance; strongly driven high

Symbol	Definition
MD0	Medium pull-down
MD1	Medium pull-up
WK0	Weak pull-down
WK1	Weak pull-up
ODIO	Open-drain I/O

Table A-5. 87C196CB Pin Status

Port Pins	Multiplexed	Status During	Status During	Status During
	With	Reset	Idle	Powerdown
P0.7:4	ACH7:4	HiZ	HiZ	HiZ
P1.7:0	EPA7:0	WK1	(Note 3)	(Note 3)
P2.0	TXD	WK1	(Note 3)	(Note 3)
P2.1	RXD	WK1	(Note 3)	(Note 3)

A-14