UM6522/A
Read Timing Characteristics (Figure 3.)
Note: tr, tf = 10 to 30ns.
CHIP SELECTS,
R E G I S T E R
SELECTS.
Rm
PERIPHERAL
DATA
DATA BUS
Figure 3. Read Timing Characteristics
Write Timing Characteristics (Figure 4.)
Symbol
TCY
Parameter
Cycle Time
$2 Pulse Width
Address Set-Up Time
Address Hold Time
R/W Set-Up Time
Rm Hold Time
Data Bus Set- Up Time
Data Bus Hold Time
Peripheral Data Delay Time
Peripheral Data Delay Time
to CMOS Levels
UM6522
Min.
1
0.44
180
0
180
0
300
10
-
-
-
-
-
1.0
2.0
I
)
Max.
50
25
-
I
lJMS22A
.
- - .--- --.
Min.
0.50
0.22
90
0
90
0
Max.
50
;!5
1
I
I
Unit
PS
TC
TACW
TCAW
TWGW
TCWW
TDCW
THW
TCFW
TCMOS
I
T
-
-
-
-
PS
ns
ns
ns
ns
ns
ns
PS
PS
q
Note: tr, tf = 10 to 30ns.
E
150
10
-
-
-
1 .o
2.0
&Y CLOCK
CHIP SELECTS.
REGISTER SELECTS.
DATA BUS
PERIPHERAL
DATA
Figure 4. Weite Timing Characteristics
5-20
UMC [ UMC CORPORATION ]
