TSSIO16E ATMEL Corporation, TSSIO16E Datasheet - Page 9

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

4.4.1.3
4.4.1.4
4421B–ASSP–10/05
Bit B3
Bits B4, B5, B6 and B7
Bit B3 is used for activating or inhibiting line surveillance.
Active surveillance: default status.
Inhibited surveillance: no more possibility to switch safety mode. Then, INT pin delivers an inter-
ruption at the end of each identified frame adressing the system.
Bits B6, B5 and B4 form an address giving the user module number (see example below). Bit
B7 is a protection bit which enables or disables access to the peripheral.
Note: whatever the status mode, it is always possible to write into the command register.
B
7
0
1
RXDi
B3
INT
0
1
B
6
module
B
5
B
4
The peripheral becomes free of access
The peripheral becomes busy with a
inhibited surveillance
active surveillance
which address is B6 B5 B4
COMMAND
COMMAND
module
14/16 TS
1 TS
The peripheral is busy with a module
The peripheral is free of access
circuit in NORMAL mode
circuit in SAFETY mode
of address B6 B5 B4
STATUS
STATUS
TSSIO16E
9