TLE8262E Datasheet, PDF (89/93 Pages) Infineon Technologies AG – Universal System Basis Chip HERMES Rev. 1.0

TLE8262E
Application Information
16.2
Hints for SBC Factory Flash Mode
The mode is used during production of the module to flash the µC. The idea is that the µC is not supplied from the
SBC but from an external 5V power supply. The reset of the µC that is connected to the RO pin of the SBC can
be driven from an external source and the SBC does not give a reset signal. Also no interrupt at the pin INT and
no signal on the SPI SDO pin is generated by the SBC. The SPI pins can be driven externally.
The mode is reached by applying 5V to the V_CC1µC pin and no voltage to the Vs pin. The Vs pin will show a voltage
of about 4.5V because of the internal diode from V_CC1µC to V_s. The current drawn at Vs must not exceed the
maximum rating of I_vs,max = -500mA. The function is designed for ambient temperature.
In case the V_s was supplied before going to FF Mode, the voltage on pin V_s must be set below 3 V before applying
5V to V_CC1µC (discharging the C)
Not
supplied
Not
supplied
Reset
5V _signal
VBAT
Vs
C
I_VS
Internal
supply
The current
flowing to other
devices from
Vs should be
limited to not
exceed the
maximum
ratings.
Other
Devices
V_CC1µC
CSN
CLK
SDO
SDI
TxD LIN1
RxD LIN1
TxD LIN2
RxD LIN2
TxD LIN3
RxD LIN3
TxD CAN
RxD CAN
INT
RO
Figure 43 Application Hint for Factor Flash Mode
CSN ^VDD
CLK
SDI
µC
SDO
TxD LIN1
RxD LIN1
TxD LIN2
RxD LIN2
TxD LIN3
RxD LIN3
TxD CAN
RxD CAN
INT
Reset V_SS
Application_ FF_Mode _2.vsd
Data Sheet
89
Rev. 1.0, 2009-03-31