W78ERD2_07 Datasheet, PDF (67/76 Pages) Winbond – 8-BIT MICROCONTROLLER

W78ERD2/W78ERD2A
20.2 Expanded External Data Memory and Oscillator
V_DD
10 u
8.2 K
v DD
OSCILLATOR
31
EA
19 _XTAL1
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 _P1.5
7 _P1.6
8 P1.7
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
RD
WR
PSEN
ALE
TXD
RXD
39 AD0
38 AD1
37 AD2
36 AD3
35 AD4
34 AD5
33 AD6
32 AD7
21 ^A8
22 A9
23 A10
24 A11
25 A12
26 A13
27 A14
28
17
16
29
30
11
10
AD0 3 _D0
AD1 4 _D1
AD2 7 _D2
AD3 8 _D3
AD4 13 _D4
AD5 14 _D5
AD6 17 _D6
AD7 18 _D7
GND 1 _OC
11 G
Q0 ^{2 A0}
Q1 ^{5 A1}
Q2 ^{6 A2}
Q3 ⁹ A3
Q4 ¹² A4
Q5
Q6
15
16
A5
A6
Q7 ^{19 A7}
74LS373
A0 ¹⁰ _A0
A1 9 _A1
A2 8 _A2
A3 7 _A3
A4 6 _A4
A5 5 _A5
A6 4 _A6
A7 3 _A7
A8 25 _A8
A9 24 _A9
A10 21
A11 23
A12 2
A13 26
A10
A11
A12
A13
A14 1 _A14
GND 20 CE
22 _OE
27
WR
20256
D0 ¹¹
AD0
D1 ^{12 AD1}
D2 ^{13 AD2}
D3 ^{15 AD3}
D4 ^{16 AD4}
D5 ^{17 AD5}
D6 ^{18 AD6}
D7 ^{19 AD7}
Figure 20-2
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Publication Release Date: February 14, 2007
Revision A10