W79E217A Datasheet, PDF (199/207 Pages) Winbond – 8-bit Microcontroller

Preliminary W79E217A Data Sheet
26. TYPICAL APPLICATION CIRCUITS
26.1 Crystal connections
Figure 26-1: Typical crystal connections
CRYSTAL
C1
C2
16 MHz
0P~20P
0P~20P
24 MHz
0P~12P
0P~12P
33 MHz
0P~10P
0P~10P
The above table shows the reference values for crystal applications.
Note: C1, C2, R components refer to Figure above.
R
-
-
3.3K
26.2 Expanded External Data Memory and Oscillator
Vcc
Vcc
10u
8.2K
OSCILLATOR
EA/VP
X1
X2
RESET
INT0
INT1
T0
T1
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
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/P
TXD
RXD
Pin-diagram of standard 8051
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
AD9
AD10
AD11
AD12
AD13
AD14
AD0 3
AD1 4
AD2 7
AD3 8
AD4 13
AD5 14
AD6 17
AD7 18
1
11
D0
Q0
D1
Q1
D2
Q2
D3
Q3
D4
Q4
D5
Q5
D6
Q6
D7
Q7
OC
G
74F373
2 A0
5 A1
6 A2
9 A3
12 A4
15 A5
16 A6
19 A7
Vcc
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 1
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
22
27
20
OE
WE
CS
28 _VCC
20256
I/O0
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
11 AD0
12 AD1
13 AD2
15 AD3
16 AD4
17 AD5
18 AD6
19 AD7
Figure 26-2: Typical External Data Memory and Oscillator connections
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Publication Release Date: December 14, 2007
Revision A3.0