DA6116.001
27 February, 2009
APPLICATION INFORMATION
Application Note 5 – Lower supply voltage MCU communication example 2
Second example of communication with lower supply voltage MCU is shown in the figure below. There are open
drain buffers used in the level shifting between 3V and 5V signal levels. In this example the DATA signal line
communication is bi-directional also on the MCU side.
+3V
+5V
+5V
+3V
4k7
+5V
4k7
DVDD
AVDD
VDD
74LVC1G07
+3V
+5V
4k7
74LVC1G07
MAS6116
MCU
4k7
DATA
GPIO
GPIO
GPIO
GPIO
+3V
+5V
4k7
CLK
XCS
74LVC1G07
+3V
+5V
4k7
74LVC1G07
+3V
+5V
4k7
74LVC1G07
XMUTE
15 (18)
MAS [ MICRO ANALOG SYSTEMS ]
