EVB90615 Datasheet, PDF (15/30 Pages) Melexis Microelectronic Systems – Infra Red Thermometer

MLX90615
Infra Red Thermometer
Figure 11: Detailed Sleep command
SCL needs to be high during Sleep. SDA can idle in each state at the same time, but the high state is
recommended as the pull-up does not add current drain. There are weak pull-ups on both SCL and SDA pins.
8.5 Switching between PWM and SMBus
8.5.1 PWM is enabled
The diagram below illustrates how to switch to SMBus if PWM is enabled. Note that the SCL pin needs to be
kept high in order to use the PWM function. The SCL pin has on-chip a weak pull-up.
SCL
t_REQ
SDA/PWM
PWM
Start
SMBus
Stop
Figure 12: Switching from PWM mode to SMBus
3901090615
Rev 001
Page 15 of 30
Data Sheet
28/Aug/2008