~ National ~ Semiconductor - Al Kossow's Bitsavers

13.0 Bus Arbitration and Timing (Continued)
BSCK
16-Bit Address, 16-Bit Data
T1 T2 T3 T4
ADO-7
--< X AO-7 DATA
~------------~}---
ADB-15
--< X A6-15 DATA
~------------~}---
ADSO
--1\
MWR,MRD
\ ~ ________...J'
TL/F/8582-66
BSCK
ADO-7 --<
ADB-15 --<
ADS1
ADSO
32-Bit Address, 8-Bit Data
T1-T4 T1 T2 T3 T4
A16-23 X AO-7 X'" ___.....;D.;..AT.;..A____.J}---
A24-31 X A6-15 }---
r--\
---J
~2r--------------------------.....
r--\
--------~Z~ ,-----------------------
\~ ___ ___.J'
TL/F/8582-67
32-Bit Address, 16-Blt Data
I T1-T4
T1
BSCK~
ADO-7 --< A16-23 X AO-7
ADB-15 --< A24-31 X A6-15
X
X
T2
I
DATA
DATA
T3
I
T4
I
}---
}---
\\..-----',
Note: In 32-bH address mode, ADS1 is at TRI-STATE,afler the first n-T4 states; thus, a 4.7k pull-down resistor is required for 32-biI address mode.
TLlF/8582-68
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