EVB90129 Datasheet, PDF (6/13 Pages) Melexis Microelectronic Systems – Asset management and monitoring (security and integrity)

EVB90129
MLX90129 Evaluation Board
Pin I/O
Name
Description
1 Output
IRQ_29
Interrupt output
2 Input
SS_MCU
Slave Select signal of the SPI bus
3 Input
VDD_SPI
External power supply
4 Output
MISO
Master In Slave Out of the SPI bus
5 Input
MOSI
Master Out Slave In of the SPI bus
6 Input
SCK
Clock of the SPI bus
7 Input
GND
Ground of the EVB
8 Output
VREG
Regulated supply voltage from MLX90129*
*Not connected per default / R14 not mounted
3.2 Slave Select selector
The CON4/SS_Selector allows switching between the several SPI
devices on the EVB. There are three communication channels:
SS_MCU
• External MCU as SPI-Master and MLX90129 as SPI-Slave
• MLX90129 as SPI-Master and external memory as SPI-Slave
(data logging application)
• External MCU as SPI-Master and external memory as SPI-Slave
CON4
12
34
SS_Selector
SS_29
SS_MEM
By selecting the connection of the Slave Selects, the SPI communication channels are switched as shown in
the following schematic and draws.
External MCU <–> MLX90129
MLX90129 <–> External memory External MCU<–>External memory
SS selector
SS_MEM
SS_29
4
3
Board
S2S_Jumpe1 r
CON4
Board
SS selector
SS_MEM
SS_29
S4S_Jump3er
Board
2
1
CON4
Board
390129012901
Rev 003
Page 6 of 13
Evaluation Board
June-2010