w78e54 Winbond Electronics Corp America, w78e54 Datasheet - Page 20

• Manufacturer Part Number: w78e54
• Description: 8-bit Microcontroller
• Manufacturer: Winbond Electronics Corp America

TYPICAL APPLICATION CIRCUITS
Expanded External Program Memory and Crystal
Note: C1, C2, R components refer to Figure A.
8.2 K
V
CC
10 u
C1
CRYSTAL
C2
Above table shows the reference values for crystal applications.
V
CC
R
12
13
14
15
18
19
31
9
8
1
2
3
4
5
6
7
16 MHz
24 MHz
33 MHz
40 MHz
CRYSTAL
W78E54
XTAL2
INT1
T0
XTAL1
RST
INT0
T1
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
EA
PSEN 29
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
P2.7
RXD 10
ALE 30
TXD 11
WR
RD
38
39
37
36
35
21
22
23
24
25
26
27
28
34
33
32
17
16
Figure A
AD1
AD3
AD2
AD4
AD5
AD6
AD7
AD0
- 20 -
30P
15P
10P
A9
A10
A11
A12
A8
A13
A14
A15
C1
5P
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD0
GND
13
14
17
18
11
3
4
7
8
1
74LS373
30P
15P
10P
D0
D1
D2
D3
D4
D5
D6
D7
OC
G
5P
C2
Q0 2
Q1 5
Q2 6
Q3 9
Q4 12
Q5 15
Q6 16
Q7 19
A0
A1
A2
A3
A4
A5
A6
A7
6.8K
4.7K
GND
R
A10
A13
A11
A12
A14
A15
-
-
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
10
25
24
21
23
26
27
20
22
2
9
8
7
6
5
4
1
3
27512
OE
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
CE
O0 11
O1 12
O2 13
O3 15
O4 16
O5 17
O6 18
O7 19
W78E54
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7