MCM63P636 Ver la hoja de datos (PDF) - Motorola => Freescale
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MCM63P636 Datasheet PDF : 27 Pages
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TRUTH TABLE (See Notes 1 and 2)
K
E
ADS
W
Next Cycle (n)
L – H False
0
X
Deselect
L – H True
0
0
Load Address, Begin Write
L – H True
0
1
Load Address, Begin Read
L–H
X
1
0
Continue Write
L–H
X
1
1
Continue Read
Mask Write
NOTES:
1. X = don’t care, 1 = logic high, 0 = logic low.
2. E = true if SE1 and SE3 = 0, and SE2 = 1.
BURST ADDRESS TABLE
1st Address (External)
X . . . X00
X . . . X01
X . . . X10
X . . . X11
2nd Address (Internal)
X . . . X01
X . . . X00
X . . . X11
X . . . X10
Input Command Code
D
BW
BR
CW
CR
MW
DQ (n + 1)
High–Z
Data In
—
Data In
—
High–Z
DQ (n+2)
—
—
Data Out
—
Data Out
—
3rd Address (Internal)
X . . . X10
X . . . X11
X . . . X00
X . . . X01
4th Address (Internal)
X . . . X11
X . . . X10
X . . . X01
X . . . X00
D, CW, CR – MW
NEW
READ*
CR
BR
DESELECT
BW
NEW
WRITE*
CW
MW
BURST
READ 1*
CR
BURST
WRITE 1*
CW
MASKED
WRITE 1*
MW
MW
BURST
READ 2*
CR
BURST
READ 3*
BR
D, CW, MW
BW
BURST
WRITE 2*
CW
MASKED
WRITE 2*
MW
MW
BW BURST
WRITE 3*
BR
D, CW, MW
MASKED
WRITE 3*
BW
D, CW, MW
BR
* Command code inputs not shown from this state are not valid.
Figure 1. Functional State Diagram
MCM63P636
6
MOTOROLA FAST SRAM
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