TLE7269G

Functional Description

Data Sheet

10

Rev. 1.2, 2007-11-13

4.2.1

Normal Slope Mode

In Normal Slope mode data transmission rates up to 20 kBauds are possible. Setting the EN pin to “High” starts

the transition to Normal Operation mode. Depending on the signal on the TxD1 pin, the TLE7269G changes either

into Normal Slope mode or Low Slope mode (see Figure 5).

The mode change to Normal Slope mode is defined by the time

t

specifies the delay time between the threshold, where the EN pin detects a “High” input signal, and the actual

mode change of TLE7269G into Normal Slope mode. The time

t

pin has be set to “High”. After the time

t

to put the part into Normal Slope mode.

In the time window

t

By mode until the time

t

Finally to release the data communication it is required to set the TxD1 and the TxD2 pin to “High” for the time

t

to,rec.

Figure 5

Timing to enter Normal Slope Mode

4.2.2

Low Slope Mode

In Low Slope mode data transmission rates up to 10.4 kBauds are possible. Setting the EN pin to “High” starts the

transition to Normal Operation mode. Depending on the signal of the TxD1 pin the TLE7269G changes either into

Normal Slope mode or Low Slope mode (see Figure 6).

The mode change to Low Slope mode is defined by the time

t

the delay time between the threshold, where the EN pin detects a “High” input signal, and the actual mode change

of TLE7269G to Low Slope mode. The time

t

“Low”. After the time

t

Low Slope mode.

In the time window

t

By mode until the time

t

Finally to release the data communication it is required to set the TxD1 and the TxD2 pin to “High” for the time

t

to,rec.

t

MODE

Stand-By Mode / Sleep Mode

Normal Slope Mode

EN

TxD1

t

TxD,SET

V

EN,ON

Mode

Transition

t

to,rec

Data transmission