TSSIO16E ATMEL Corporation, TSSIO16E Datasheet - Page 8

• Manufacturer Part Number: TSSIO16E
• Description: Tssio16e Van Peripheral Circuit 16 Inputs-outputs
• Manufacturer: ATMEL Corporation

4.4.1.1
4.4.1.2
8
TSSIO16E
Line diagnosis operation
Bits B0, B1 and B2
definitions' frame
The below shows the mechanism for changing to the safety mode. Exit from the safety mode
must be managed by the application.
Note: FR7 status corresponds to the detection of an activity on the lines.
The 3 low significant bits of the COMMAND register define the input line and its mode of use.
The 3 low significant bits of the STATUS register inform about the componant’s status (line
selected by the application) and the possibility of using other lines.
The "triple sampling correct" function (RXD0 = RXD1 = RXD2) is defined by the logic condition:
conform
B
2
0
0
0
0
1
1
1
1
• Automatic mode
• Automatic
• Forced mode:
RDXi:
Transparent mode:
B
E = (RXD0 x RXD1 x RXD2) + (/RXD0 x /RXD1 x /RXD2)
1
0
0
1
1
0
0
1
1
B
0
0
1
0
1
0
1
0
1
coherent frame
degraded mode
SAFETY mode
after RESET
normal or
VAN bus
LTO
forced to RXD0 with RXD0 = RXD1 = RXD2
automatic, initialized on RXD0
automatic, initialized on RXD1
automatic, initialized on RXD2
automatic transparent mode
input line selection mode
SLTO
COMMAND register
forced to RXD0
forced to RXD1
forced to RXD2
7 transitions on RXi
STO or MTO or LTO
successive use of lines RXD0, RXD1, RXD2, starting from RDXi.
no effect on line selection mode, allows modification of bits from
B7 to B3 without modifying the selected line
line unchanged in spite of presence of TIME-OUT.
STO or MTO or LTO
STO
STO
STO
7 transitions on RXi
7 transitions on RXi
STO or MTO or LTO
RXD0 / triple sampling incorrect
RXD1 / triple sampling incorrect
RXD2 / triple sampling incorrect
RXD0 / triple sampling correct
RXD1 / triple sampling correct
RXD2 / triple sampling correct
input line selection status
triple sampling incorrect
triple sampling correct
STATUS register
4421B–ASSP–10/05