W78C58 Datasheet, PDF (18/22 Pages) Winbond – 8-BIT MICROCONTROLLER

APPLICATION CIRCUIT
Expanded External Program Memory and Crystal
W78C58
VCC
10u
8.2K
C1
VCC
CRYSTAL
C2
35
EA
21 _X1
R _{20 X2}
10 RESET
14
INT0
15 INT1
16 T0
17
T1
2 P1.0
3 P1.1
4 P1.2
5 P1.3
6 P1.4
7 P1.5
8 P1.6
9 P1.7
W78C58
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
43 AD0
42 AD1
41 AD2
40 AD3
39 AD4
38 AD5
37 AD6
36 AD7
24 A8
25 A9
26 _A10
27 A11
28 A12
29 A13
30 A14
31 A15
19
18
32
33
13
11
AD0 3 _D0
AD1 4 D1
AD2 7 D2
AD3 8 D3
AD4 13 D4
AD5 14 D5
AD6 17 D6
AD7 18 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
74LS373
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
GND 20
22
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
CE
OE
27512
O0 ¹¹
AD0
O1
O2
O3
12
13
15
AD1
AD2
AD3
O4
O5
O6
16
17
18
AD4
AD5
AD6
O7 ^{19 AD7}
Figure A
Table 1 Shows the typical values of off-chip components to configure the on-chip oscillator.
Table 1. Off-chip components list
CRYSTAL FREQ.
12 MHz
16 MHz
20 MHz
24 MHz
33 MHz
40MHz
C1
30 pF
30 pF
15 pF
15 pF
10 pF
5 pF
C2
30 pF
30 pF
15 pF
15 pF
10 pF
5 pF
R
-
-
-
-
6.8 KΩ
4.3 KΩ
Notes:
1. Refer to Figure 10 for C1, C2 and R.
2. It is recommended that an oscillator be used as external clock source when operating freq. is above 35MHz. Apply the
external clock signal to XTAL1, and leave XTAL2 float, as shown in Figure 10.
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