TLE7263E Datasheet, PDF (16/63 Pages) Infineon Technologies AG – Integrated HS-CAN, LIN, LDO and HS Switch System Basis Chip

TLE 7263E
Features
4.7
SBC Stop Mode with Cyclic Wake
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 main voltage regulator
remains active. In contrast to Cyclic Sense the HS-On state is entered once Cyclic Wake
is selected, immediately providing supply voltage at the OUTHS pin. The microcontroller
determines the duration of the HS-On state via the STS input pin (see Figure 9). Further
transitions from that HS-Off into the HS-On state are done by the selected cyclic wake
period or by a bus message. The microcontroller is notified by the WKO (Wake-Up
Output) that the HS-On state has been entered. Further notification is done in the same
way as for Cyclic Sense in Stop Mode.
SBC Active Mode
MS2 MS1 MS0 Vcc1
0 0 / 1 0 / 1 ON
SBC Standby Mode
Vcc1
ON
Start Up
Power Up
µController SPI-Command:
- select „cyclic wake“ via SPI Bit
- select „cyclic wake period“ via SPI Timing Bits
- select HS-Switch on-time via SPI „On-Time Bit“
- select SBC Stop Mode via SPI Mode Bits
- window watchdog activation / deactivation via SPI
[„off“ once current consumption below threshold]
Initialization of
MONx inputs ¹⁾
SBC Stop Mode
MS2 MS1 MS0 Vcc1
1
1
1 ON
HS-Switch = OFF
automatic transition by:
- cyclic wake period
- CAN message
- LIN message
via STS pin
or
after „on-time“
STS
select SBC
operating mode
µC ²⁾
sampling of MON1…3 inputs
[MON4 active permanently]
HS Cyclic Wake
MS2 MS1 MS0 Vcc1
1
1
1 ON
HS-Switch = ON
WKO
cyclic wake-up
µC wake-up inputs
1) _{if initialization fails, device is}
switched into SBC Standby mode
2) _{window watchdog activated}
automatically once current
threshold is exceeded
cyclic_wake_stop_TLE7263
Figure 9 State Diagram “SBC Stop Mode with Cyclic Wake”
Data Sheet
16
Rev. 1.51, 2007-06-22