ZiLOG Z80 - Contact Information

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7UGT
U/CPWCN
80 2YHUYLHZ
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PDLQWDLQFRQWURORIWKHEXVIRUDVPDQ\FORFNF\FOHVDVLVUHTXLUHG,IYHU\
ORQJ'0$F\FOHVDUHXVHGDQGG\QDPLFPHPRULHVDUHXVHGWKHH[WHUQDO
FRQWUROOHUDOVRSHUIRUPVWKHUHIUHVKIXQFWLRQ7KLVVLWXDWLRQRQO\RFFXUVLI
YHU\ODUJHEORFNVRIGDWDDUHWUDQVIHUUHGXQGHU'0$FRQWURO'XULQJDEXV
UHTXHVWF\FOHWKH&38FDQQRWEHLQWHUUXSWHGE\HLWKHUDQ10,
RUDQ,17
VLJQDO
)LJXUH %XV5HTXHVW$FNQRZOHGJH&\FOH
,QWHUUXSW5HTXHVW$FNQRZOHGJH&\FOH
)LJXUH LOOXVWUDWHVWKHWLPLQJDVVRFLDWHGZLWKDQLQWHUUXSWF\FOH7KH&38
VDPSOHVWKHLQWHUUXSWVLJQDO,17
ZLWKWKHULVLQJHGJHRIWKHODVWFORFNDW
WKHHQGRIDQ\LQVWUXFWLRQ7KHVLJQDOLVQRWDFFHSWHGLIWKHLQWHUQDO&38
VRIWZDUHFRQWUROOHGLQWHUUXSWHQDEOHIOLSIORSLVQRWVHWRULIWKH%865(4
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VLJQDOLVDFWLYH:KHQWKHVLJQDOLVDFFHSWHGDVSHFLDO0F\FOHLV
JHQHUDWHG'XULQJWKLVVSHFLDO0F\FOHWKH,254
VLJQDOEHFRPHVDFWLYH
LQVWHDGRIWKHQRUPDO05(4
WRLQGLFDWHWKDWWKHLQWHUUXSWLQJGHYLFHFDQ
SODFHDQELWYHFWRURQWKHGDWDEXV7ZRZDLWVWDWHVDUHDXWRPDWLFDOO\
DGGHGWRWKLVF\FOH7KHVHVWDWHVDUHDGGHGVRWKDWDULSSOHSULRULW\LQWHUUXSW
VFKHPHFDQEHHDVLO\LPSOHPHQWHG7KHWZRZDLWVWDWHVDOORZVXIILFLHQW
Sample
Sample
Floating
Last T State
T
X
T
X
T
X
T
1
Any M Cycle
Bus Available Status
CLK
D
7
— D
0
A
15
— A
0
BUSREQ
MREQ, RD
BUSACK
WR. IORQ,
RFSH