W78E54C Datasheet, PDF (20/24 Pages) Winbond – 8-BIT MICROCONTROLLER

W78E54C/W78E054C
9. TYPICAL APPLICATION CIRCUITS
9.1 Expanded External Program Memory and Crystal
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 _P1.0
2 _P1.1
3 _P1.2
4 _P1.3
5 _P1.4
6
7
8
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 ^{35 AD4}
P0.5 ^{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
AD1 4 D1
AD2 7 D2
AD3 8 D3
AD413 D4
AD514 D5
AD617 D6
AD718 D7
Q0 ^{2 A0}
Q1 ^{5 A1}
Q2 6 ^A2
Q3 9 A3
Q4 ^{12 A4}
Q5 ^{15 A5}
Q6 16 ^A6
Q7 19 A7
GND 1 _OC
11 _G
74373
A0 10 _A0
A1 9 _A1
A2
A3
A4
A5
8
7
6
5
A2
A3
A4
A5
A6 4
A7 3
A8 25
A9 24
A10 21
A11 23
A12 2
A13 26
A14 27
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15 1 _A15
O0
O1
O2
11
12
13
AD0
AD1
AD2
O3 ^{15 AD3}
O4 ^{16 AD4}
O5
O6
17
18
AD5
AD6
O7 ^{19 AD7}
P2.7 ^{28 A15}
GND20 _CE
RD ₁₇
WR 16
22 _OE
PSEN
ALE
TXD
RXD
29
30
11
10
27512
Figure A
CRYSTAL
C1
C2
R
16 MHz
30P
30P
-
24 MHz
15P
15P
-
33 MHz
10P
10P
6.8K
40 MHz
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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