908E625_07 Datasheet, PDF (23/48 Pages) Freescale Semiconductor, Inc – Integrated Quad Half H-Bridge with Power Supply, Embedded MCU, and LIN Serial Communication

FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
RESET
The 908E625 chip has four internal reset sources and one
external reset source, as explained in the paragraphs below.
Figure 11 depicts the internal reset sources.
RESET INTERNAL SOURCES
Autonomous Watchdog
AWD modules generates a reset because of a timeout
(watchdog function).
High-Temperature Reset
To prevent damage to the device, a reset will be initiated if
the temperature rises above a certain value. The reset is
maskable with bit HTRE in the Reset Mask Register. After a
reset the high-temperature reset is disabled.
Low-Voltage Reset
The LVR is related to the internal V_DD. In case the voltage
falls below a certain threshold, it will pull down the RST_A pin.
SPI REGISTERS
VDD
RST_A
AWDRE Flag
HVRE Flag
HTRE Flag
AWD Reset
Sensor
High-Voltage
Reset Sensor
High-Temperature
Reset Sensor
Low-Voltage Reset
MONO
FLOP
Figure 11. Internal Reset Routing
High-Voltage Reset
The HVR is related to the external V_SUP voltage. In case
the voltage is above a certain threshold, it will pull down the
RST_A pin. The reset is maskable with bit HVRE in the Reset
Mask Register. After a reset the high-voltage reset is
disabled.
Analog Integrated Circuit Device Data
Freescale Semiconductor
908E625
23