Intel 8XC196MH manual Microcontroller Meets These Specifications, Address Setup to ALE/ADV# Low

8XC196MC, MD, MH USER’S MANUAL

	Table 15-9. Microcontroller Meets These Specifications
Symbol	Definition
TAVLL	Address Setup to ALE/ADV# Low
	Length of time address is valid before ALE/ADV# falls. Useful when using an external latch to
	demultiplex the address from the address data bus.
†	CLKOUT High CLKOUT Low
TCHCL
	CLKOUT pulse width. Useful when using CLKOUT to clock external devices.
†	CLKOUT Cycle Time
TCLCL
	The period of the CLKOUT signal; equal to 2TXTAL1.
†	CLKOUT Low to ALE/ADV# High
TCLLH
TLHLH	ALE Cycle Time
	Minimum time between two ALE rising edges.
TLHLL	ALE High to ALE Low
	ALE pulse width. Useful when using an external latch to demultiplex the address from the
	address data bus.
TLLAX	AD15:0 Hold after ALE/ADV# Low
	Length of time address is valid after ALE/ADV# falls. Useful when using an external latch to
	demultiplex the address from the address data bus.
†	ALE/ADV# Low to CLKOUT High
TLLCH
TLLRL	ALE/ADV# Low to RD# Low
	Length of time after ALE/ADV# falls before the microcontroller asserts RD#. Maximum time a
	memory system has to decode the address before the microcontroller asserts RD#.
TLLWL	ALE/ADV# Low to WR# Low
	Length of time after ALE/ADV# falls before the microcontroller asserts WR#. Maximum time a
	memory system has to decode the address before the microcontroller asserts WR#.
TQVWH	Output Data Valid to WR# High
	Length of time output data is valid before the microcontroller deasserts WR#.
TRHAX	Address (high byte) Hold after RD# High
	Minimum time the high byte of the address (when using an 8-bit data bus) is valid after the
	microcontroller deasserts RD#.
TRHBX	BHE#, INST Hold after RD# High
	Minimum time these signals are valid after the microcontroller deasserts RD#.
TRHLH	RD# High to ALE High
	Time between the microcontroller deasserting RD# and the next ALE pulse. Maximum time the
	memory system has to put data on the bus before the next address cycle.
TRLAZ	RD# Low to Address Float
	Time after the microcontroller deasserts RD# until it stops driving the address on the bus.
TRLRH	RD# Low to RD# High
	RD# pulse width.

†The CLKOUT pin is available only on the 8XC196MC, MD microcontrollers.

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