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5.4.3
SPI Bus
The SPI signals are connected to the onboard SPI flash and also to the feature connector (X34). The SPI signals on the feature connector
provides the ability to boot the conga-IA4 from external flash. This however requires a customized adapter for triggering the BIOS_DISABLE#
signal (pin 46) of the feature connector.
Note
The congatec customized adapter for the feature connector is for internal use only.
5.5
LPC Super I/O Device
The conga-IA4 has an onboard Super I/O controller that provides additional interfaces such as two serial interfaces, optional ccTALK, GPOs,
4-wire CPU and system fans. The Super I/O controller is connected to the SoC's LPC Bus.
5.5.1
Serial Ports (COM)
The Super I/O controller on the conga-IA4 provides two fully featured RS-232 compliant UART interfaces (COM 0 and 1). The COM 1 interface
can be optionally used as ccTALK compliant interface. The COM ports can drive up to 115 kbit/s at a maximum cable length of 15 m.
Table 21 Serial Ports (Connectors X21/X23) Pinout Description
Pin Signal
Description
Pin Signal
Description
1
DCD
Data Carrier Detect
6
DSR
Data Set Ready
2
RXD
Received Data
7
RTS
Request to Send
3
TXD
Transmit Data
8
CTS
Clear to Send
4
DTR
Data Terminal Ready
9
RI
Ring Indicator
5
GND
Ground
10
N.C
Not connected
Connector Type
X21,X23: 2.54mm pitch, 2x5 pin headers
Note
congatec offers cables for the COM ports (see section 1.2.2 “Optional Accessories"). For more information, contact congatec technical
solution department.
COM 0 & 1 - Connectors X21/X23
Pin 1
Pin 2
