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4.1.2
I²C Bus
The I²C signals are available in different locations on the conga‑CEVAL including the feature connector (X27) described in section 5.8 of this
document.
The conga‑CEVAL includes a socket for an I²C EEPROM (U17) that can be used for test purposes during the system development. This 8 pin
DIP socket can be used with different 2‑wire serial EEPROMS (for example 24C04 / 08 / 16 ...) and can be accessed easily by using the I²C
control commands implemented in the congatec CGOS API driver. Refer to the COM Express™ module's user's guide and CGOS manual for
details.
Furthermore, the conga‑CEVAL includes an I²C application implemented by a PCA9555 device from Philips, a 16‑bit I²C I/O port with interrupt.
This device provides 16 bits of general purpose parallel Input/Output (GPIO) expansion for I²C applications. It provides the ability to display and
read different byte configurations via the I²C digital I/O jumper connectors X5 and X12.
Contact the congatec AG support team for more information.
Connector Type
X5/X12: 2.54mm grid header
4.1.3
SPI Bus
The SPI Bus is connected to the SPI BIOS flash that supports off-module BIOS flash boot. The conga-CEVAL revision C1 has onboard an SPI
socket for 8‑lead Small Outline Integrated Circuit (200 mils).
Copyright © 2012 congatec AG
I²C Digital I/O
X5
19
17
15
13
11
9
7
5
3
1
20
18
16
14
12
10
8
6
4
2
X12
1
3
5
7
9
13
15
11
17
19
2
4
6
8
10
12
14
16
18
20
CEVA_c_m10
I
C EEPROM
2
(S3)
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