W78E54C Datasheet, PDF (21/24 Pages) Winbond – 8-BIT MICROCONTROLLER

W78E54C/W78E054C
Typical Application Circuits, continued
9.2 Expanded External Data Memory and Oscillator
V_DD
V_DD
10 u ^OSCILLATOR
8.2 K
31
EA
19 _XTAL1
18 _XTAL2
9 _RST
12 ^INT0
13 _INT1
14
15
T0
T1
1
2
3
4
P1.0
P1.1
P1.2
P1.3
5
6
P1.4
P1.5
7
8
P1.6
P1.7
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
39 AD0
38 AD1
37 AD2
36 AD3
35 AD4
34 AD5
33 AD6
32 AD7
AD0 3 _{D0 Q0} 2 A0 A0 10 _A0
AD1 4 _{D1 Q1} 5 A1 A1 9 A1
AD2 7 _{D2 Q2} 6 A2 A2 8 A2
AD3 8 _{D3 Q3} 9 A3 A3 7 A3
AD4 13 D4 Q4 12 A4 ^A4 6 A4
AD5 14 _{D5 Q5} 15 A5 A5 5 A5
AD6 17 _{D6 Q6} 16 A6 A6 4 A6
AD7 18 _{D7 Q7} 19 A7 A7 3 A7
D0 ^{11 AD0}
D1 ^{12 AD1}
D2 ^{13 AD2}
D3 ^{15 AD3}
D4 ^{16 AD4}
D5 ^{17 AD5}
D6 ^{18 AD6}
D7 ^{19 AD7}
P2.0 21 A8 ^{GND 1} _OC
A8 25 _A8
A9 24 _A9
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
P2.7
22 A9
23 A10
24 A11
25 A12
26 A13
27 A14
28
11 _G
74373
A10 21 _A10
A11 23 _A11
A12 2 _A12
A13 26 _A13
A14 1 _A14
GND ₂₀ CE
RD ₁₇
WR 16
22 _OE
27 _WR
PSEN
ALE
29
30
TXD
RXD
11
10
20256
W78E54B
Figure B
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Publication Release Date: October 3, 2006
Revision A4