SAE81C91NE13 Infineon Technologies, SAE81C91NE13 Datasheet - Page 27

• Manufacturer Part Number: SAE81C91NE13
• Manufacturer: Infineon Technologies

Specifications of SAE81C91NE13

• 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: Not Compliant

Transmit Request Registers
The Transmit Request Set Registers provide a transmission request bit (TRSn) for each message
object. Setting a transmission request bit causes the respective message x to be transmitted. The
bit is cleared by hardware after transmission. Several bits can be set simultaneously. In this way all
messages whose request bits are set are transmitted in turn, starting with the memory location with
the highest number.
Note: A transmission request bit is set by writing ’1’ to the respective bit location (TRSn). Writing ’0’
TRSR2
Address: 09
Reset Value: 00
TRSR1
Address: 08
Reset Value: 00
Bit(field)
TRSn
n = 0...15
The Transmit Request Reset Registers provide a transmit request reset bit (TRRn) for each
transmit request bit TRSn, i.e. for each message object.
Writing ’1’ to a TRRn bit clears the corresponding transmission request bit TRSn. This causes a
transmission request, initiated by the corresponding bit TRSn, to be cancelled, provided that it is not
currently processed.
This scheme avoids conflicts when writing to register bits while they are cleared by hardware
because of a completed transmission.
Note: Registers TRRRx cannot be read.
Semiconductor Group
has no effect.
H
H
H
H
Function
Transmit Request Set Bit
’0’:
’1’:
TRS15
TRS7
No change of the respective transmit request bit.
The respective transmit request bit is cleared.
rw
rw
7
7
07Feb95@09:05h Intermediate Version
TRS14
TRS6
rw
rw
6
6
TRS13
TRS5
rw
rw
5
5
26
TRS12
TRS4
rw
rw
4
4
TRS11
TRS3
rw
rw
3
3
TRS10
TRS2
rw
rw
2
2
SAE 81C90/91
TRS9
TRS1
rw
rw
1
1
TRS8
TRS0
rw
rw
0
0