TLE6266G Datasheet, PDF (7/50 Pages) Infineon Technologies AG – System Basis Chip

Target Datasheet TLE 6266
V_bat stand-by Mode
In the V_bat stand-by mode the CAN transmitter and receiver stage are deactivated, to
achieve a low power consumption. All other functions are active as in the normal mode
(see Table 3). The CANL line is pulled-up to battery supply voltage via the RTL output
and CANH pulled to GND via RTH. A wake-up request via a CAN message on the bus
is immediately reported to the microcontroller by setting RxD=LOW. The wake pin WK
is not active in this mode. A power-on condition (V_bat pin is supplied) or a watchdog reset,
automatically switches the TLE 6266 to V_bat stand-by mode. Also if the supply voltage
drops below the specified limits (undervoltage reset), the transceiver is automatically
switched to V_bat stand-by mode or power down mode, respectively.
Cyclic Wake Modes
In the cyclic wake operation mode the lowest power consumption is achieved. This mode
consists of two states, the Cyclic HS ON and the Cyclic HS OFF mode.
In the HS ON state the transmitter, receiver and all switches, except the HS3 switch, are
deactivated. The CANL line is pulled-up to battery supply voltage via the RTL output and
CANH pulled to GND via RTH. A wake-up via CAN bus message sets the RxD output to
LOW. In the HS ON state, a long open window is started. If there is no valid watchdog
trigger or a PWM transition into the HS OFF state during this time, a watchdog reset is
activated. Only a correct trigger signal on the PWM Pin causes a transition into the cyclic
HS OFF state. This is called the “failsafe PWM” feature.
In the HS OFF state, almost all functions of the IC are deactivated(also HS3-switch).
Only the wake-up input, the oscillator and the power-on reset circuit are activated. The
oscillator is used to realize the HS3-cyclic wake function.This automatically switches to
HS ON state after a programed time, to enabled HS3 (see Table 2).The CANL line is
pulled-up to battery supply voltage via the RTL output and CANH pulled to GND via RTH.
Only the wake up via CAN message sets the RxD to low (visible in HS ON state).
There are three possibilities to enter the cyclic HS ON mode from the HS OFF mode:
• the cyclic wake function
• a falling edge at the wake-up pin
• a CAN bus wake
Table 2 SPI Bit settings for the cyclic wake function
Input Bit 13
0
0
1
1
Version 1.06
Input Bit12
0
1
0
1
Period
48ms
96ms
192ms
no cyclic wake-up
# of Cycles
(1 cycle = 512µs typ.)
94
188
376
-
8
2002-11-26