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參數(shù)資料
| 型號： | TLE7824G |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| 封裝： | GREEN, PLASTIC,SOP-28 |
| 文件頁數(shù)： | 6/53頁 |
| 文件大?。?/td> | 900K |
| 代理商： | TLE7824G |
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TLE7824G
Operating Modes
Data Sheet
14
Rev. 3.01, 2008-04-15
4.5.2
SBC Stop Mode
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 “l(fā)ow”. RxD is pulled “l(fā)ow”
until mode switch, while DO stays “l(fā)ow” for two internal SBC cycles. (The microcontroller itself has to take care of
switching SBC modes after a wake-up event notification (see Figure 7).)
Note: The window watchdog is automatically disabled once the LDO output current goes below a specified
“watchdog current threshold”, unless the SPI setting “WD On/Off” prevents this (see Figure 10, Watchdog
Note: If the Window Watchdog was not enabled in Stop Mode the Window Watchdog starts after wake-up with a
“l(fā)ong open window” in SBC Standby Mode.
Figure 7
State Diagram “SBC Stop Mode”
Start Up
Power Up
SBC Active Mode
MS2
ON
Vcc
MS1
01
MS0
0 / 1
SBC Stop Mode
MS2
ON
Vcc
MS1
11
MS0
1
single“ Controller SPI -Command :
- select SBC Stop Mode via SPI Mode Bits
- window watchdog activation / deactivation via SPI
[off“ once current consumption below threshold ]
transition caused by :
- event at MONx inputs
- LIN message
[SPI indicates source]
wake event notification [to C]:
- LIN msg. => RxD + DO (low“)
- MONx => DO (low“)
SBC Standby Mode
ON
Vcc
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