8x300 design guide - Al Kossow's Bitsavers - Trailing-Edge
8x300 design guide - Al Kossow's Bitsavers - Trailing-Edge
8x300 design guide - Al Kossow's Bitsavers - Trailing-Edge
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PRELIMINARY SPECIFICATION<br />
BT39-I,XL<br />
TRUTH TABLE<br />
SELECT DATA TRANSFER ADDRESS·<br />
DE SC WC MCLK LATCH DIRECTION COMPARISON<br />
L L L X Set 01 Bus .... DO Bus No<br />
L L L X Not set 01 Bus - DO Bus No<br />
L L H X X 01 Bus - DO Bus No<br />
L H X L X 01 Bus - DO Bus No<br />
L H X H X 01 Bus - DO Bus Yes<br />
H X X X X 01 Bus - DO Bus No<br />
NOTES<br />
'When an address comparison is made, the select latch is set if the data on the 01 Bus is within the<br />
manufactured address range of the IV Bus Expander. Otherwise, the select latch is cleared.<br />
FUNCTIONAL BLOCK DIAGRAM<br />
TO OTHER<br />
DATA PATHES<br />
DOX<br />
10F8<br />
DATA PATHES<br />
ENABLE<br />
O-BUS<br />
ENABLE<br />
I-BUS<br />
WC (OUT)<br />
WC(IN)<br />
SC (OUT)<br />
SC (IN)<br />
ME (OUT)<br />
ME (IN)<br />
MCLK (OUT)<br />
MCLK (IN)<br />
NOTES<br />
Selection made during manufacture<br />
X = Don't care<br />
4<br />
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