Overview
1. Overview
This manual describes the hardware of the CAN-PCI/331 and the DN-PCI/331 because both
devices are based on a comparable design.
1.1 Description of the CAN-PCI/331
Figure 1:
Block circuit diagram of CAN-PCI/331
The CAN-PCI/331 is an intelligent PC card for PCI-bus systems. It is equipped with a MC68331
microcontroller, that controls the CAN data locally. The microcontroller buffers the CAN data in a
local SRAM. Data security and consistency are guarantated up to 1 Mbit/s.
The ISO 11898 compliant CAN-interfaces allow a data transfer rate of 1 Mbit/s. Among many
other features the bit rate can be set by software. The CAN interface is electrically isolated from
the other potentials by optocouplers and DC/DC-converters.
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Hardware Manual • Doc. No.: C.2020.21 / Rev. 1.6
CAN-PCI/331
+5 V=
+5 V=
Microcontroller
68331
SRAM
Arbiter
+5 V=
+5 V=
CAN
CAN
IRQ A
Physical
CAN
Layer
electrical isolation
DC/DC
Converter
DSUB9
CiA pinning
CAN Controller
SJA1000
Flash EPROM
PCI Bridge
PLX9050
electrical isolation
DC/DC
Converter
PCI Card Edge Connector
CAN Controller
SJA1000
Physical
CAN
Layer
DSUB9
CiA pinning
2nd CAN Interface
only at
CAN-PCI/331-2
CANBUS
CANBUS
