TLE8262E Datasheet, PDF (70/93 Pages) Infineon Technologies AG – Universal System Basis Chip HERMES Rev. 1.0

TLE8262E
Configuration Select
14
Configuration Select
14.1
Configuration select
The Configuration select is used to set the device for two different SBC behaviors; please refer to Chapter 4.2.1
for detailed information. Depending on the requirements of the application, the V_cc1µC is switched off and the device
goes to Fail-Safe Mode in case of watchdog fail (1 or 2 fail) or reset clamped. To turn V_cc1µC OFF (Config 2/4), the
INT pin is not connected to a pull up resistor externally. In case the V_cc1µC is not switched off (Config 1/3) the INT
pin is connected to V_cc1µC with a pull up resistor. The configuration is only read during Init Mode, after that the
configuration is stored.
14.2
Config Hardware Descriptions
In Init Mode before the RO pin goes high the INT pin is pulled to low with a weak pull down resistor R_CFG, the pull
up resistor R_INT is switched off. When V_cc1µC is high, above the reset threshold V_RT1 and before the RO pin goes
high the level on the INT pin is monitored to select the configuration. With RO going high in Init Mode the pull up
resistor R_INT is switched on.
Figure 33 gives the electrical equivalents to the configuration function of the INT pin.
Configuration logic
Interrupt logic
Time
out
Vc c 1µC
R IN T
INT
R C FG
INTERRUPT BLOCK_CONFIG.VSD
Figure 33 Config Logic Diagram
Electrical characteristics are listed in chapter Chapter 12.5
Data Sheet
70
Rev. 1.0, 2009-03-31