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Pin
Number
Al3
Al4
A15
A16
Al7
AlB
Al9
A20
A21
A22
SUPPORT INFORMATION
TABLE 5- 2. CONNECTOR P2 INTERCONNECT SIGNALS (cont.)
Signal
Mnemonic
MAD24
MAD26
MAD2B
MAD30
GND
MIRQ*
MDS*
MWRITE*
SPACE0
SPACEl
Signal Name and Description
VSBbus MULTIPLEXED ADDRESS/DATA (bit 24) - Same
as MAD00 on pin AI.
VSBbus MULTIPLEXED ADDRESS/DATA (bit 26) - Same
as MAD00 on pin AI.
VSBbus MULTIPLEXED ADDRESS/DATA (bit
2B) -
Same
as MAD00 on pin AI.
VSBbus MULTIPLEXED ADDRESS/DATA (bit 30) - Same
as MAD00 on pi n AI.
GROUND
VSBbus INTERRUPT REQUEST - This signal. when low,
indicates that a secondary master or sl ave device
is attempting to interrupt the primary master.
This line is an active low, TTL open-collector
signal.
VSBbus DATA STROBE - The fa
11
i ng edge of MDS*
indicates that a valid data transfer will occur on
the bus (MAD00 to MAD31) at this time. During
write cycles, write data is valid at the falling
edge of MDS*. This line is an active low, TTL
three-state signal.
VSBbus WRITE - This signal, when low, indicates
that a write operation is to be performed and when
high, indicates that a read operation will occur.
~1WRITE
is valid when MAS* is asserted on the bus.
This line is an active low, TTL three-state
signal.
VSBbus SPACE SELECT 0 (bit 0) - One of two signals
that are driven by the active master and used to
select either one of three address spaces (i.e ..
the System Address Space, the I/O Address Space,
or the Alternate Address Space), or to initiate an
interrupt acknowledge, or an arbitration cycle.
VSBbus SPACE SELECT
I
(bit
1) -
Same as SPACE0 on
pin A2I.
5-7
•
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