w77e58 Winbond Electronics Corp America, w77e58 Datasheet - Page 79

• Manufacturer Part Number: w77e58
• Description: 8 Bit Microcontroller
• Manufacturer: Winbond Electronics Corp America

Movx Characteristics Using Strech Memory Cycles, continued
Note: t
EXPLANATION OF LOGIC SYMBOLS
In order to maintain compatibility with the original 8051 family, this device specifies the same
parameter for each device, using the same symbols. The explanation of the symbols is as follows.
ALE Low to
Port 0 Address to
Low
Port 2 Address to
Low
Data Valid to WR Transition
Data Hold after Write
RD
RD
for each selection of the Stretch value.
MCS
Low to Address Float
or WR high to ALE high
is a time period related to the Stretch memory cycle selection. The following table shows the time period of t
PARAMETER
RD
M2
0
0
0
0
1
1
1
1
or
RD
RD
WR
or
or
Low
WR
WR
M1
0
0
1
1
0
0
1
1
SYMBOL
t
t
t
t
t
t
t
LLWL
AVWL
AVWL2
QVWX
WHQX
RLAZ
WHLH
M0
0
1
0
1
0
1
0
1
0.5t
1.5t
t
2.0t
1.5t
2.5t
-5
1.0t
t
2.0t
0
1.0t
CLCL
CLCL
VARIABLE
- 79 -
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLOCK
- 5
- 5
MIN
- 5
- 5
- 5
- 5
- 5
- 5
- 5
- 5
2 machine cycles
3 machine cycles
4 machine cycles
5 machine cycles
6 machine cycles
7 machine cycles
8 machine cycles
9 machine cycles
MOVX Cycles
0.5t
1.5t
0.5t
10
1.0t
Preliminary W77E58
VARIABLE
Publication Release Date: March 1999
CLCL
CLCL
CLCL
CLCL
CLOCK
MAX
+ 5
+ 5
- 5
+ 5
12 t
16 t
20 t
24 t
28 t
4 t
8 t
t
UNITS
MCS
0
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
nS
nS
nS
nS
nS
nS
nS
MCS
Revision A1
STRECH
t
t
t
t
t
t
t
t
t
t
t
t
MCS
MCS
MCS
MCS
MCS
MCS
MCS
MCS
MCS
MCS
MCS
MCS
= 0
= 0
= 0
= 0
= 0
= 0
>0
>0
>0
>0
>0
>0