MCZ33689DEW Freescale Semiconductor, MCZ33689DEW Datasheet - Page 21

• Manufacturer Part Number: MCZ33689DEW
• Description: IC SYSTEM BASIS CHIP LIN 32-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MCZ33689DEW

• Applications: Automotive
• Current - Supply: 5mA
• Voltage - Supply: 5.5 V ~ 18 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 32-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WINDOW WATCHDOG
resistor at
MODE1 and MODE2 bit in the SPI Register (refer to
page 24; also refer to the section entitled
Description on page
Figure
has not been cleared at the end of the open window, the
watchdog will generate a reset on the
whole device.
(150 ms) (first watchdog clear) has no window.
Window Watchdog Configuration
selected (typ. 150 ms). If no watchdog function is required,
the
following formula:
VDD VOLTAGE REGULATOR
regulator to provide internal power and external power for the
MCU. The on-chip regulator consist of two elements, the
main voltage regulator and the low-voltage reset circuit.
and provides a regulated V
Analog Integrated Circuit Device Data
Freescale Semiconductor
The window watchdog can be configured using an external
A watchdog clear is only allowed in the open window (see
Note The watchdog clear in Normal request mode
If the
The watchdog timer’s period is calculated using the
t
The 33689 chip contains a low-power, low dropout voltage
The VDD regulator accepts an unregulated input supply
WDC
WDC
No Watchdog Clear Allowed
1). If the watchdog is cleared in the closed window or
WDC
= 0.991
Window Closed.
pin must be connected to GND.
Figure 1. Window Watchdog Operation
WDC
t
WDC
pin is left open, the default watchdog period is
pin. The watchdog is cleared through
* 50%
*
R +0.648 (with R in kΩ and t
19.
Watchdog Period
DD
t
WDC
supply to all digital sections of
for Watchdog Clear
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
Window Open
t
WDC
RST
* 50%
Functional Pin
pin and reset the
WDC
Table
in ms).
2,
the device. The output of the regulator is also connected to
the VDD pin to provide the 5.0 V to the microcontroller.
Current Limit (Overcurrent) Protection
against overcurrent and short circuit conditions.
Overtemperature Protection
protection that has an overtemperature warning (Interrupt -
VDDT) and an overtemperature shutdown.
Stop Mode
regulated output voltage. The Stop mode regulator has a
limited output current capability.
Sleep Mode
turned off.
VDD VOLTAGE REGULATOR TEMPERATURE
PREWARNING
generated if the voltage regulator temperature is above the
T
and an interrupt will be initiated. The VDDT bit remains set as
long as the error condition is present.
temperature prewarning circuitry is disabled.
HIGH-SIDE SWITCH THERMAL SHUTDOWN
generated if one of the high-side switches HS1 : HS3 is above
the HSST threshold. It will shutdown all high-side switches
and set the HSST flag in the SPI Register, and an interrupt
will be initiated. The HSST bit remains set as long as the error
condition is present. During Sleep and Stop modes the high-
side switch thermal shutdown circuitry is disabled.
PRE
The voltage regulator has current limit to protect the device
The voltage regulator also features overtemperature
During Stop mode, the Stop mode regulator supplies a
In Sleep mode, the voltage regulator external VDD is
VDD voltage regulator temperature prewarning (VDDT) is
During Sleep and Stop modes the VDD voltage regulator
The high-side switch thermal shutdown HSST is
threshold. It will set the VDDT bit in the SPI Register
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
FUNCTIONAL DESCRIPTION
33689
21