TLE 8458G Infineon Technologies, TLE 8458G Datasheet - Page 12

• Manufacturer Part Number: TLE 8458G
• Manufacturer: Infineon Technologies

Specifications of TLE 8458G

• Packages: PG-DSO-8
• Transmission Ratemax: 20.0 kbit/s
• Quiescent Current (max.): < 10 µA sleep mode
• Bus Wake-up Capability: Yes
• Additional Features: Vreg, EN, WK
• Wake-up Inputs: Bus wake-up + wake-up pin

5.2.2.1
In Normal Slope Mode the maximum data transmission rate of the LIN transceiver devices TLE8458G,
TLE8458GV33, TLE8458GU and TLE8458GUV33 is limited by the slope control mechanism of LIN output signal.
The limitation of the slew rate of the LIN output signal results in an optimized radiated emission fulfilling automotive
EMC requirements.
The data transmission rate of the TLE8458G and the TLE8458GV33 is limited to 20 kBaud in Normal Operation
Mode and the devices are compliant to the specification LIN2.1
The data transmission rate of the TLE8458GU and the TLE8458GUV33 is limited to 10,4 kBaud in Normal
Operation Mode. These two devices are compliant to the SAE-J2602-2 specification.
5.2.2.2
Software Flash Mode is a Normal Operation Mode and it is possible to transmit data to the LIN bus and receive
data from the LIN bus. The slope control mechanism of the LIN transmitter output stage is disabled and therefore
it is possible to reach higher data transmission rates, disregarding the EMC limitation of the LIN network. The
Software Flash Mode can be used for programming the external microcontroller via the LIN bus, got example
during the production flow of the ECU.
The Software Flash Mode can only be entered from Normal Slope Mode (see
low for the time
low phase of the EN pin, the TLE8458Gx changes to the Software Flash Mode (see
TLE8458Gx changes from Software Flash Mode to Normal Slope Mode by applying the same sequence to the EN
pin and the TxD pin.
In any case, regardless if the device is in Normal Slope Mode or in Software Flash Mode, a LOW signal on the EN
pin changes the operation mode to Sleep Mode or Stop Mode. The slope control mechanism will be activated,
when the device changes to the Normal Operation Mode again.
Figure 5
Data Sheet
TxD
Normal
EN
Mode
Normal Slope Mode
Software Flash Mode
Software Flash Mode
t
t
fl1
fl2
and by generating a falling and a rising edge at the TxD pin with the time
t
fl3
t
fl1
t
fl3
Flash Mode
Software
12
t
fl2
t
Figure
fl3
t
fl1
3). By setting the EN pin to
Figure
Rev. 1.01, 2009-04-28
t
fl3
t
fl2
5). Vice versa, the
TO20070515.vsd
and
TLE8458Gx
Mode Control
t
fl3
Normal
Mode
during the