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Read Operation

During reads, the address is registered during the frist clock edge, the internal array is read between this first edge and the second-
edge, and data is captured in the output register and driven to the CPU during the second clock edge. SS is driven low during this
cycle, signaling that the SRAM should drive out the data.
During consecutive read cycles where the address is the same, the data output must be held constant without any glitches. This
characteristic is because the SRAM will be read by devices that will operate slower than the SRAM frequency and will require multi-
ple SRAM cycles to perform a single read operation.
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Symbol	Parameter	Condition	Rating	Unit
Tj	Junction temperature		-40+150	Yc
Tstg	Storage temperature		-40+125	YC
Vis	Isolation voltage	AC l min.	2500	V
	Mounting torque	Mounting M4 screw	1.471.96	N'm
	Weight	Typical value	60	g

MC68331CF25 datasheet

OIM	IHCHES	MILLIMETEHS	DIM	IHCHES	MILLIM ETEIIS
^ B C 0	.57 .16 .25 .48	14.5 4.0 6.4 12.3	E F G	75 20 026	19 1 5.1 65

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When the data transfer across the Mll is complete, the MAC deasserts the TX_EN signal and the LAN83C180 adds
End-of-Stream Delimiters (ESD) symbols onto the end of the data stream. The complete data stream (the Physical
Layer Stream) is encoded from 4 bits int0 5 bits, scrambled, converted to MLT3 and driven to the TXOP and TXON
pin differentially.
MC68331CF25 pdf

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