Copyright
©
2012
congatec
AG
CEVA_c_m10
23/47
4.1.4.3
LPC Super I/O device
The conga‑CEVAL integrates a Super I/O controller that provides additional interfaces such as PS/2 keyboard and mouse, two serial ports, and
a parallel port. The Winbond W83627HG controller is connected to the LPC Bus of the COM Express™ module and the module must support
these interfaces in order for them to function. Refer to the module's user's guide for information about supported features.
The interfaces provided by this Super I/O controller are available on connectors X28, X38, X54 and X55. Both Serial port COM1 and COM2
are based on RS232 standard.
For the pinout of the mouse, keyboard, COM1, COM2, LPT1 and the Floppy port see the table below.
Pin
LPT1
COM1
COM2
Mouse
Keyboard
1
STROBE#
DCD#
DCD#
MSDAT
KBDAT
2
PD0
RXD
DSR
N.C.
N.C.
3
PD1
TXD
RXD
GND
GND
4
PD2
DTR#
RTS#
+5V
+5V
5
PD3
GND
TXD
MSCLK
KBCLK
6
PD4
DSR
CTS#
N.C.
N.C.
7
PD5
RTS#
DTR#
8
PD6
CTS#
RI#
9
PD7
RI#
GND
10
ACK#
+5V (750mA fuse)
11
BUSY
12
PE
13
SEL
14
AUTOFD#
15
ERROR#
16
INIT#
17
SELIN#
18
GND
19
GND
20
GND
21
GND
22
GND
23
GND
24
GND
25
GND
COM1
X55
(front view)
LPT1
VGA
X54
Mouse
Keyboard
1
3
2
4
5
6
7
8
9
1
0
COM2
(X28)