IPC/RSL8xxx-XxxxE: user documentation
DOC/IPC_RSL8-E; V1.9
© Syslogic Datentechnik AG, Switzerland, http://www.syslogic.com
38
/
80
3.3.10.
I2C Interface
The RSL8 features one I2C interface on an internal connector on the PC/104 bus expansion
rows F/E (see paragraph 3.3.16 for details). The interface is integrated into the processor
module (see processor module datasheet for details). The signals are non-buffered 3.3V
LVCMOS interfaces with integrated pullups.
Consult processor module datasheet for programming details.
Device Connection I2C
The first I2C interface uses connector P46. Mating connector type: Housing Molex 51021-
0400, Crimp contact Molex 50058-8100. Wiring: AWG26.
Pin Number
Signal
Remarks
1
VCC (3.3V)
not fused!
2
SDA
3.3V LVCMOS with integrated pullup
3
SCL
3.3V LVCMOS with integrated pullup
4
GND
Tab. 24 I2C Interface Connector P46
Important Note
This interface is intended for case internal use only.
3.3.11.
Watchdog
The watchdog timer is hardware configurable for 100 ms or 1 s shortest timeout. Longer
timeouts may be achieved by programming the Watchdog Configuration Register.
Once timed out, it may activate the RSL8 hardware reset or the processors NMI line depending
on software configuration.
Configuration Options
Switch
Configuration
Remarks
S1
even positions ‘0’, ‘2’, ‘4’, ‘6’, ‘8’ = 1 s
odd positions ‘1’, ‘3’, ‘5’, ‘7’ = 100 ms
Tab. 25 Watchdog Configuration Options
