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參數資料
| 型號： | TLE7824G |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 模擬信號調理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| 封裝： | GREEN, PLASTIC,SOP-28 |
| 文件頁數： | 5/53頁 |
| 文件大小： | 900K |
| 代理商： | TLE7824G |
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Data Sheet
13
Rev. 3.01, 2008-04-15
TLE7824G
Operating Modes
4.5
Power Saving Modes
4.5.1
SBC Sleep Mode
During SBC Sleep Mode (see Figure 6), the lowest power consumption is achieved, by having its main voltage
regulator switched-off. As the microcontroller cannot be supplied, the integrated window watchdog can be disabled
in Sleep Mode via a dedicated SPI control bit. However, it can be turned-on for periodically waking-up the system,
e.g. ECU, by generating a reset and automatically switching to SBC Standby Mode.
This mode is entered via SPI command, and turns-off the integrated LIN bus transceiver, main voltage regulator
as well as all switches. Upon a voltage level change at the monitoring / wake-up pins or by LIN message the SBC
Sleep Mode will be terminated and the SBC Standby Mode will automatically be entered (turning-on the LDO).
Note: Upon a wake-up via LIN message the (internal) RxD signal stays “low” until mode switch.
Note: If the Window Watchdog was not enabled in Sleep Mode the Window Watchdog starts after wake-up with a
“long open window” in SBC Standby Mode.
Note: In Sleep Mode with activated watchdog (see Table 2 “SPI Input Data Bits” on Page 21) the oscillator
remains turned on.
Figure 6
State Diagram “SBC Sleep Mode”
Start Up
Power Up
SBC Standby Mode
ON
Vcc
single“ Controller SPI -Command:
- select SBC Sleep Mode via SPI Mode Bits
- window watchdog activation / deactivation via SPI
[can remain active as periodic reset timer ]
SBC Active Mode
MS2
ON
Vcc
MS1
01
MS0
0 / 1
transition caused by :
- event at MONx inputs
- LIN message
[SPI indicates source]
SBC Sleep Mode
MS2
OFF
Vcc
MS1
10
MS0
0
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