5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
EXT1 10BaseTEXT0
8255 24 bit I/O-Extension and
8254 Timer/Counter
(c) 1996 - 99 CHIP D1
0.5
IPC@CHIP SC12 circuit example
IPC GmbH
Germany - 35578 Wetzlar
Garbenheimer Stra sse 38
A4
1 1Tuesday, November 23, 1999
Title
Size Document Num ber Rev
Date: Sheet of
A1
AD2
AD1
AD7
WR#
AD6
AD5
AD2
AD0
RD#
AD1
AD4
PCS0#
AD6
A0
AD7
AD3
A0
PCS0#
AD7
A1
A1
PCS3#
A0
AD0
AD2
AD0
TMROUT1
WR#
AD6
AD1
WR#
RD#
RD#
AD3 AD3
AD4
AD5
AD4
AD5
PCS3#
Reset
Reset
VCC
GND
IC2
8255
34
33
32
31
30
29
28
27
5
36
9
8
35
6
4
3
2
1
40
39
38
37
18
19
20
21
22
23
24
25
14
15
16
17
13
12
11
10
D0
D1
D2
D3
D4
D5
D6
D7
RD
WR
A0
A1
RESET
CS
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
IC3
8254
8
7
6
5
4
3
2
1
22
23
19
20
21
9
11
10
15
14
13
18
16
17
D0
D1
D2
D3
D4
D5
D6
D7
RD
WR
A0
A1
CS
CLK0
G0
OUT0
CLK1
G1
OUT1
CLK2
G2
OUT2
IC1
IPC@CHIP SC12
8
9
10
11
12
13
14
15
22
23
27
28
29
24
18
19
20
21
2
1
3
4
5
6
25
26
31
30
17
16 7
32
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
RD
WR
MCS0/PCS1/P4/TMRIN0/A0
PCS5/P3/TMROUT1/TMRIN1/A1
PCS6/P2/A2
ALE/PCS0
TPTX+
TPTX-
TPRX+
TPRX-
TXD0/P8
RXD0/P7
CTS0/ENRX0/P9
RTS0/RTR0/P10
TXD1/P11
RXD1/INT3/P12
CTS1/MEN/PCS2/P6/INT2/INTA/PW
RTS1/MOSI/PCS3/P5/INT4
I2CCLK/MSCK/DRQ1/INT6/P0
I2CDAT/MISO/DRQ0/INT5/P1
RESET_PFAIL_LILED
GND TMROUT0/INT0/P13
VCC
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