W78LE812 Datasheet, PDF (22/25 Pages) Winbond – 8-BIT MTP MICROCONTROLLER

TYPICAL APPLICATION CIRCUITS
Expanded External Program Memory and Crystal
W78LE812
V_DD
V_DD
10 u
8.2 K
CRYSTAL
C1
C2
31
EA
19 _XTAL1
R _{18 XTAL2}
9 _RST
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
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 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 _A0
A1 9 _A1
A2 8 _A2
A3 7 _A3
A4 6
A5 5
A6 4
A7 3
A8 25
A4
A5
A6
A7
A8
A9 24 _A9
A10 21 _A10
A11 23 _A11
A12 2 _A12
A13 26 _A13
A14 27 _A14
A15 1 _A15
O0 ^{11 AD0}
O1 ^{12 AD1}
O2 ^{13 AD2}
O3 ^{15 AD3}
O4 ^{16 AD4}
O5
O6
17
18
AD5
AD6
O7 ^{19 AD7}
P2.7 ^{28 A15}
GND _{20 CE}
RD 17
WR 16
22 _OE
PSEN ²⁹
ALE
TXD
30
11
RXD ¹⁰
27512
W78LE812
Figure A
CRYSTAL
C1
C2
R
16 MHz
30P
30P
-
24 MHz
15P
15P
-
Above table shows the reference values for crystal applications.
Note: C1, C2, R components refer to Figure A.
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