Copyright
©
2012
congatec
AG
CEVA_c_m10
20/47
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).
I
2
C EEPROM
(S3)
1
2
3
4
5
6
7
8
9
10
I²C Digital I/O
X5
X12
11
12
13
14
15
16
17
18
19
20
1
3
2
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
