w65c51n Western Design Center, Inc., w65c51n Datasheet - Page 30

• Manufacturer Part Number: w65c51n
• Description: Asynchronous Communications Interface Adapter Acia
• Manufacturer: Western Design Center, Inc.

CS
0
, CS
1
B, RS
DATA BUS
PHI2 Cycle Time
PHI2 Pulse Width
Address Set-Up Time
Address Hold Time
RWB Set-Up Time
RWB Hold Time
Data Bus Set-Up time
Data Bus Hold Time
Read Access Time (Valid Data)
Read Hold Time
Bus Active Time (Invalid Data)
Notes:
1. V
2. T
3. t
0
RWB
R
PHI2
RS
A
CC
and t
= T
1
= 5.0V ± 5%
L
F
to T
Parameter
= 10 to 30 nSs.
DATABUS
H
RWB
t
ACW
t
WCW
t
R
Figure 25 Read Timing Characteristics
Figure 24 Write Timing Diagram
t
WCR
Table 3 AC Characteristics
t
CDA
t
C
Symbol
t
CDR
t
t
t
t
t
t
t
t
t
CWH
DCW
CDR
t
CYC
CAH
CDA
WC
t
HW
HR
AC
C
t
DCW
t
CYC
Min
500
200
60
60
60
10
10
20
0
0
t
t
-
t
F
CAH
t
HR
CWH
t
2 MHz
HW
Max
150
-
-
-
-
-
-
-
-
-
-
Min
250
100
30
30
35
10
10
0
0
5
-
V
V
4 MHz
IH
IL
Max
50
-
-
-
-
-
-
-
-
-
-
Units
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
V
V
V
V
V
V
V
V
IH
IH
IL
IL
IL
IH
IH
IL
30