TLE7258

Functional Description

Data Sheet

7

Rev. 1.1, 2015-08-20

4.1

Operating Modes

The TLE7258 has 3 major operation modes (see Figure 4):

•

Normal Operation mode

•

Standby mode

•

Sleep mode

Figure 4

Operation mode state diagram

Table 1

Operating modes

Mode

EN

INH

TxD

RxD

LIN Bus Termination Comments

Sleep

Low

1) The TxD input is disabled in Sleep mode and the internal pull-up current source is switched off (see Figure 1).

2) A pull-up resistor to the external microcontroller supply is required.

30 kΩ (typical)

No wake-up request detected

Standby

Low

High

3) In case the TxD input is open the state is internally set to logical “high” through the internal pull-up current source.

Low

High2)

30 kΩ (typical)

RxD “low” after a bus wake-up

RxD “high“ after Power-up

Normal

Operation

High High

Low

High

Low

High

30 kΩ (typical)

RxD reflects the signal on the bus

TxD driven by the microcontroller

TLE7258_MODE_DIAGRAM

RxD:

logical „high“ after Power-up

RxD:

logical „low“ after BUS Wake-up detection

An external pull-up resistor to the external microcontroller supply is required for the Wake-up or Power-up indication

Normal Operation Mode

INH: High

EN: High

EN

EN

Sleep Mode

INH: Floating

EN: Low

TxD: Disabled

2)

RxD: High

3)

BUS Wake-up

Power-up

Standby Mode

INH: High

EN: Low

TxD: High

RxD: Wake-up source

1)

2

1

3

4

5

6