mlx90603 Melexis Company, mlx90603 Datasheet - Page 11

• Manufacturer Part Number: mlx90603
• Description: Tire Pressure Monitoring Sip Low-power Pressure Sensor
• Manufacturer: Melexis Company

The IC is designed for maximizing the battery life time in automotive applications. Four different operating
modes are considered:
7.3.1 SHELF MODE
In Shelf Mode the battery voltage is applied, but the IC consumes very little power: only the Power-On-
Reset circuit is active (note: above 80
TPMS module has been assembled and tested. In this mode the battery leakage is the biggest limit on
battery life. The module can exit shelf mode by an external interrupt, for instance a mechanical motion
switch or a strong RFID signal.
7.3.2 SLEEP MODE
Only the VLFO Oscillator is active in sleep mode. A digital counter will wake up the microcontroller on pre-
programmed VLFO time intervals, as preset in software (typical between 0 – 64 sec). During SLEEP MODE
the total current consumption is I
7.3.3 RUN MODE
When the microcontroller clock is running (Clock = High Frequency Oscillator = HFO), the IC is in RUN
MODE and the microcontroller is executing instructions. Current consumption of the chip is now increased
to Irun.
7.3.4 IDLE MODE
During measurements the microcontroller is not used. Therefore an IDLE MODE has been introduced in
which only the ADC is functional, but the microcontroller is NOT executing instructions.
3901090603 Rev.002
7.3 Current consumption
SLEEP
= I
o
C the consumption increases). This shelf mode is used after the
SHELF
YES
YES
CPU clock
DISABLE
disabled?
disabled?
External
interrupt
wake-up
SHELF
MODE
MODE
RUN
HFO
LFO
+ I
Page 11 of 18
VLFO.
NO
NO
SLEEP
MODE
Interrupt wake-up Request
Timer wake-up Request
End of ADC conversion
Tire Pressure Monitoring SiP
MODE
IDLE
Low-Power Pressure Sensor
MLX90603
19 July 2007