mlx90615 Melexis Company, mlx90615 Datasheet - Page 14

• Manufacturer Part Number: mlx90615
• Description: Infra Red Thermometer
• Manufacturer: Melexis Company

8.4.5 Bit transfer
The data on SDA must be changed when SCL is low (min 300ns after the falling edge of SCL). The data is
fetched by both MD and SDs on the rising edge of the SCL.
8.4.6 Commands
In application mode RAM and EEPROM can be read both with 16x16 sizes. (For example,
address 0x07h will sweep between 0x2D8Ah to 0x4BD0h as the object temperature rises from -40°C to
+115°C). The MSB read from RAM is an error flag (active high) for the linearized temperatures (T
Note*: The aaaa are the 4 LSBits of the memory map address to be read/written.
8.4.7 Sleep Mode
Sleep mode is available in SMBus mode only.
MLX90615 can enter Sleep Mode via command “Enter SLEEP mode” sent via the SMBus interface.
MLX90615 goes back into power-up default mode by forcing the SCL pin low for at least t
from Sleep is always in SMBus mode. Valid data will be available typically 0.3 seconds after the device has
woken up.
Note: The previous generation IR thermometer, MLX90614 wakes up through a low pulse on the SDA line,
not SCL.
3901090615
Rev 001
SDA/PWM
SCL
Opcode
0001 aaaa*
0010 aaaa*
1100_0110
Sleep command
PWM/SDA
SCL
Command
EEPROM Access
RAM Access
Enter SLEEP mode
Stop
Figure 9: Bit transfer on SMBus
Figure 10: Enter and exit Sleep
Sampling
data
Page 14 of 30
Sleep
Changing
data
Wake-up
t
DDQ
Normal operation
Infra Red Thermometer
MLX90615
DDq
T
OBJ
= 50 ms. Exit
- RAM
Data Sheet
28/Aug/2008
OBJ
and T
a
).