TLE 7259-2GE Infineon Technologies, TLE 7259-2GE Datasheet - Page 11

• Manufacturer Part Number: TLE 7259-2GE
• Manufacturer: Infineon Technologies

Specifications of TLE 7259-2GE

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

Figure 6
4.3
The Stand-By mode is entered automatically after:
•
•
•
•
•
In Stand-By mode no communication on the LIN Bus is possible. The output stage is disabled and the LIN Bus
termination remains activated. The RxD and the TxD pin are used to indicate the Wake-Up source or a Power-Up
event. The RxD pin remains “Low“ after a local Wake-Up event on the pin WK and a bus Wake-Up event on the
LIN bus. A Power-Up event is indicated by a logical “High“ on the RxD pin. The signal on the TxD pin indicates the
Wake-Up source, a weak pull-down signals a bus Wake-Up event on the LIN bus and a strong pull-down signals
a local Wake-Up event caused by the WK pin (see
the TxD pin, the external microcontroller output needs to provide a logical “High” signal. The Wake-Up flags
indicating the Wake-Up source on the pins TxD and RxD are reset by changing the operation mode to Normal
Operation mode.
The signal on the EN pin remains “Low“ due to an internal pull-down resistor. Setting the EN pin to “High“, by the
microcontroller returns the TLE7259-2GE to Normal Operation mode. In Stand-By mode the INH output is
switching to
Table 2
power up
Yes
No
No
1) To indicate the Wake-Up sources via the RxD pin, a pull-up resistor to the external microcontroller supply is required.
2) The TxD input needs an external termination to indicate a “High” or a “Low” signal. The external termination could be a
3) A local Wake-Up event is considered after a low signal on the pin WK (see
4) A bus Wake-Up event is considered after a low to high transition on the LIN bus (see
Data Sheet
A Power-Up event at the supply
A bus Wake-Up event at the pin BUS.
A local Wake-Up event at the pin WK.
A power on reset caused by power supply
In Stand-By mode the Wake-Up sources are monitored by the TxD and RxD pins.
pull-up resistor or an active microcontroller output.
TxD
Normal Slope
EN
Mode
V
Timing to enter and leave Flash Mode
Stand-By Mode
Logic table for wake up monitoring
S
WK
1
Wake-
Up
1
. The INH output can be used to control external devices like a voltage regulator.
t
fl2
3)
BUS
1
1
Wake-
Up
4)
t
fl3
t
fl1
RxD
1
0
0
V
1)
t
S
fl4
.
TxD
1
0
1
V
t
2)
S
torec
Data transmission
Flash Mode
Table 1
Remarks
No Wake-Up, Power-Up event
Wake via wake pin
Wake via BUS
11
and
Table
t
fl2
2). In order to detect a Wake-Up event via
Chapter
t
fl3
t
4.7).
fl1
Chapter
t
Functional Description
fl4
4.6)
Rev. 1.1, 2008-09-05
Normal Slope
TLE7259-2GE
Data transm.
t
Mode
torec