W78E54B Datasheet, PDF (19/21 Pages) Winbond – 8-BIT MICROCONTROLLER

TYPICAL APPLICATION CIRCUITS
Expanded External Program Memory and Crystal
W78E54B
V_DD
V_DD
10 u
31
EA
19 _XTAL1
CRYSTAL
R _{18 XTAL2}
8.2 K
9 _RST
C1
C2
12 ^INT0
13 INT1
14 T0
15 _T1
1
2
P1.0
P1.1
3 _P1.2
4
5
6
7
8
P1.3
P1.4
P1.5
P1.6
P1.7
W78E54B
P0.0 ^{39 AD0}
P0.1 ^{38 AD1}
P0.2 ^{37 AD2}
P0.3 ^{36 AD3}
P0.4
P0.5
35 AD4
34 AD5
P0.6 ^{33 AD6}
P0.7 ^{32 AD7}
P2.0 ^{21 A8}
P2.1 ^{22 A9}
P2.2 ^{23 A10}
P2.3 ^{24 A11}
P2.4 ^{25 A12}
P2.5 ^{26 A13}
P2.6 ^{27 A14}
AD0 3 _{D0 Q0} 2 A0
AD1 4 D1 Q1 5 A1
AD2 7 D2 Q2 6 A2
AD3 8 D3 Q3 9 A3
AD413 D4 Q4 12 A4
AD514 D5 Q5 15 A5
AD617 D6 Q6 16 A6
AD718 D7 Q7 19 A7
GND 1 _OC
11 _G
74373
A0 10
A1 9
A2 8
A3 7
A4 6
A5 5
A6 4
A7 3
A8 25
A9 24
A10 21
A11 23
A12 2
A13 26
A14 27
A15 1
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
O0
O1
O2
O3
O4
O5
O6
O7
11
12
13
15
16
17
18
19
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
P2.7 ^{28 A15}
GND _{20 CE}
RD ₁₇
WR 16
22 _OE
PSEN
ALE
TXD
RXD
29
30
11
10
27512
Figure A
CRYSTAL
16 MHz
24 MHz
33 MHz
40 MHz
C1
C2
R
30P
30P
-
15P
15P
-
10P
10P
6.8K
5P
5P
4.7K
Above table shows the reference values for crystal applications (full gain).
Note: C1, C2, R components refer to Figure A.
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Publication Release Date: December 2000
Revision A3