SAE81C91N Infineon Technologies, SAE81C91N Datasheet - Page 14

• Manufacturer Part Number: SAE81C91N
• Manufacturer: Infineon Technologies

Specifications of SAE81C91N

• Number Of Transceivers: 1
• Power Down Mode: Sleep
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 28
• Lead Free Status / RoHS Status: Supplier Unconfirmed

Descriptor Registers
A descriptor register is available for each message object and contains the eleven bits of the
message identifier (ID.0 through ID.10), the remote-transmission-request bit (RTR) and the data
length code (DLC) of a message.
DRnH
Address: XX
Reset Value: UU
DRnL
Address: XX
Reset Value: UU
Bit(field)
DLC
RTR
ID.10-0
n = 0...15
Bit RTR determines the function of the corresponding message object when it is transmitted, and its
reaction on a received data frame or remote frame.
The table below summarizes the message object’s behaviour in the different cases.
Note:
Semiconductor Group
RTR bit Object is transmitted
(remote
frame)
frame)
(data
’0’
’1’
For the transmission of remote frames (RTR = 1) the data-length-code should be set to ‘0’.
The message object is
transmitted as a standard
data frame.
The message object is
transmitted as a remote
frame (i.e. a request).
H
H
Function
Data Length Code
Defines the number of data bytes of message n.
Defined values are 0000...1000, i.e. 0...8 bytes. Other values are not permitted.
Remote Transmission Request Bit
‘0’:
‘1’:
Note: See description and table below.
Identifier
Identifier associated with message n, controls the acceptance of received frames
and is inserted into transmitted frames.
H
H
ID.10
This message operates as a data frame.
This message operates as a remote frame.
ID.2
rw
rw
7
7
07Feb95@09:05h Intermediate Version
ID.9
ID.1
rw
rw
6
6
Matching Data Frame
received
The data frame is stored in
the message object.
The data frame is ignored
and not stored.
ID.8
ID.0
rw
rw
5
5
13
RTR
ID.7
rw
rw
4
4
ID.6
rw
rw
3
3
Matching Remote Frame
received
The remote frame is
ignored.
The message object is sent
as a data frame.
ID.5
rw
rw
2
2
DLC
SAE 81C90/91
ID.4
rw
rw
1
1
ID.3
rw
rw
0
0