TLE8250G_14 Datasheet, PDF (8/24 Pages) Infineon Technologies AG – High Speed CAN-Transceiver

TLE8250G
Functional Description
4.2
Operation Modes
Three different operation modes are available on TLE8250G. Each mode with specific characteristics in terms of
quiescent current or data transmission. For the mode selection the digital input pins NEN and NRM are used.
Figure 4 illustrates the different mode changes depending on the status of the NEN and NRM pins. After suppling
V_CC to the HS CAN transceiver, the TLE8250G starts in Stand-By mode. The internal pull-up resistors are setting
the TLE8250G to Stand-By per default. If the microcontroller is up and running the TLE8250G can change to any
operation mode within the time for mode change t_Mode.
Undervoltage
V_CC < V_CC(UV)
Detection on V_CC
Start – Up
Supply V_CC
Power Down
Stand-By Mode
NRM = 1
NEN = 0
NEN = 1 NRM = 0/1
NRM = 0
NEN = 0
NRM = 0/1
NEN = 1
Normal Operation
Mode
NRM = 0
NEN = 0
NRM = 0/1
NEN = 1
Receive-Only Mode
NEN = 0 NRM = 1
NRM = 1
NEN = 0
NEN = 0 NRM = 0
Figure 4 Operation Modes
The TLE8250G has 3 major operation modes:
• Stand-By mode
• Normal Operation mode
• Receive-Only mode
Table 2 Operating modes
Mode
NRM NEN
Normal
Operation
“High” “Low”
Stand-By
“Low” “High”
or
“High”
Receive-Only “Low” “Low”
V_CC off
“Low” “Low”
or
or
“High” “High”
Bus Bias
V_CC/2
Floating
Comments
Output driver stage is active.
Receiver unit is active.
Output driver stage is disabled.
Receiver unit is disabled.
V_CC/2
Floating
Output driver stage is disabled.
Receiver unit is active.
Output driver stage is disabled.
Receiver unit is disabled.
Data Sheet
8
Rev. 1.1, 2014-10-09