TLE8263-2E Datasheet, PDF (32/94 Pages) Infineon Technologies AG – Universal System Basis Chip

TLE8263-2E
Confidential
High Speed CAN Transceiver
8.2.3 CAN OFF Mode
CAN OFF Mode, which can be accessed in the SBC Stop, Sleep, Restart and Normal modes, and automatically
accessed in SBC Init and Factory Flash modes, is used to completely stop CAN activities. In CAN OFF Mode, a
wake up event on the bus will be ignored.
8.2.4 CAN Receive Only Mode
In CAN Receive Only Mode (RxD only), the driver stage is de-activated but reception is still operational. This mode
is accessible by an SPI command.
8.2.5 CAN Cell in Disabled State
During disable state, when V_s < V_{UV_OFF}, the CAN cell does not have enough supply voltage. In this state, the
CANH and CANL pins are set to high impedance, to guarantee passive behavior. The maximum current that can
flow in the CANH and CANL pins in this mode are specified by I_CANH,lk and I_CANL,lk.
8.3
CAN Cell Mode with SBC Mode
Table 7 shows all the CAN modes accessible to the current SBC Mode. Automatic transition from one CAN mode
to an other is only allowed in the same column.
.
Table 7
HS CAN States, Based on SBC modes
SBC Mode
CAN Mode
INIT Mode
OFF
Normal Mode
OFF
Wake capable
Stop Mode
OFF
Wake capable
Sleep Mode
OFF
Wake capable
Restart Mode
OFF
Wake capable
Fail-Safe Mode
Wake capable
SW Flash Mode
Normal
Normal
Receive only
8.3.1 SBC Normal Transition to Sleep or Stop Mode
During the transition from SBC Normal to Sleep or Stop Modes, the receiver module is deactivated and replaced
by the low power mode receiver for wake-up capability. The next message can be only a wake-up call. It is possible
to set the SBC directly from SBC Normal Mode (with CAN Normal Mode) to SBC Sleep or Stop Mode, but this is
not recommended, because a wake pattern on the CAN network that could occurs during SPI communication
could get lost. It is preferable, in SBC Normal Mode to first send the CAN transceiver into CAN Wake Capable
Mode, and then set the entire device to SBC Sleep or Stop Mode. In the unlikely case that the device would see
a wake up call during the transmission order “SBC go to sleep”, the device will store this event and bypass the
“SBC go to sleep” command to go back into SBC Restart Mode.
Do not change the Transciever setting with the same SPI command that is used to sent the device to Sleep Mode.
8.3.2 Transition from SBC Sleep to other Modes
In SBC Sleep Mode, a wake-up on the CAN cell will set the SBC to Restart Mode automatically if the CAN Wake
Capable Mode of the SBC is selected via SPI. Figure 11 shows the typical timing.
Data Sheet
32
Rev. 1.0, 2009-03-31