TLE 7824G Infineon Technologies, TLE 7824G Datasheet - Page 14

• Manufacturer Part Number: TLE 7824G
• Manufacturer: Infineon Technologies

Specifications of TLE 7824G

• Packages: PG-DSO-28
• Flash: 24.0 kByte
• Frequency (f): 24.0 MHz
• High Side Switch: 1
• High Voltage Monitor Input: 5
• Gpio: 8

4.5.2
The SBC Stop Mode has the advantage of reducing the current consumption to a minimum, while supplying the
microcontroller with its quiescent current during its power saving mode (“Stop”). This mode is entered via SPI
command, and turns-off the integrated bus transceivers and respective termination, but the voltage regulator for
the microcontroller supply remains active. A microcontroller in a power saving mode has the advantage over a
turned-off microcontroller to have a reduced reaction time upon a wake-up event.
A voltage level change at the monitoring/wake-up pins will, in contrast to the behavior in Sleep Mode, generate a
signal that indicates the wake-up event at the microcontroller in Power-Down Mode. This is realized via an
interconnect from the SPI of the SBC [DO] to the microcontroller [P1.4]. In case the wake-up event was a LIN
message, the respective RxD pin of the SBC and the SPI Data Out [DO] will be pulled “low”. RxD is pulled “low”
until mode switch, while DO stays “low” for two internal SBC cycles. (The microcontroller itself has to take care of
switching SBC modes after a wake-up event notification (see
Note: The window watchdog is automatically disabled once the LDO output current goes below a specified
Note: If the Window Watchdog was not enabled in Stop Mode the Window Watchdog starts after wake-up with a
Figure 7
Data Sheet
MS2
“watchdog current threshold”, unless the SPI setting “WD On/Off” prevents this (see
disable current
“long open window” in SBC Standby Mode.
0
SBC Active Mode
MS1
SBC Stop Mode
State Diagram “SBC Stop Mode”
1
MS0
0 / 1
„single“ µController SPI -Command :
- select SBC Stop Mode via SPI Mode Bits
- window watchdog activation / deactivation via SPI
[„off“ once current consumption below threshold ]
threshold,
Vcc
ON
MS2
1
Table 14
SBC Stop Mode
MS1
1
and
MS0
1
“Window Watchdog Reset Period Settings” on Page
Vcc
ON
14
SBC Standby Mode
Figure
7).)
Vcc
ON
wake event notification [to µC]:
- LIN msg. => RxD + DO („low“)
- MONx => DO („low“)
transition caused by :
- event at MONx inputs
- LIN message
[SPI indicates source]
Figure
Rev. 3.01, 2008-04-15
Operating Modes
Power Up
10,
Start Up
TLE7824G
Watchdog
23).