82C900 Datasheet, PDF (6/29 Pages) Infineon Technologies AG – Standalone TwinCAN Controller

82C900
Preliminary
The TwinCAN module permits the connection and autonomous handling of two
independent CAN buses.
• Full-CAN module with 32 message objects, which can be independently assigned to
one of the two buses.
• The CAN protocol version 2.0B active with standard and extended identifiers can be
handled.
• The full CAN baud rate range is supported.
• Scalable FIFO mechanism for reception and transmission in order to improve the real-
time behavior of the system.
• Built-in automatic gateway functionality for data exchange between both CAN buses.
The gateway feature can also be used for automatic reply to received messages
(lifesign: “I got it!”).
• Powerful interrupt structure, permitting application-specific interrupt generation.
• Remote frames can be monitored.
• Enhanced acceptance filtering (an acceptance mask for each message object).
• A 16 bit frame count / timestamp is implemented for each message object.
• Analyzing mode (no dominant level will be sent) supported.
Figure 1 shows a block diagram of the 82C900 device architecture.
CTRL0..CTRL3
P0..P7
MODE0, MODE1
OUT0, OUT1
XTAL1, XTAL2
RESET, RDY
RXDCA, RXDCB
TXDCA, TXDCB
4
Port
CAN
8
Control
data
2
Interrupt
int
CAN CAN
Control
Node Node
2
AB
Clock
clk
2
control
2
addr
Message
Object
2
SSC
data
Buffer
2 _{Device Control}
TwinCAN Control
Figure 1 Standalone TwinCAN Architecture
Note: The CAN bus transceivers are not integrated and have to be connected externally.
Data Sheet
6
V 1.0D3, 2001-03