Please i have one qustion about connection 2 MCU with different supply voltage. First MCU MC9S08AW16 has supply voltage 5V and is connected to the MC9S12NE64 demonstration board. MC9S12NE64 has a voltage level for IO pins around 3V. In the datasheet are these Absolute Maximum Ratings:
I/O, Regulator and Analog Supply Voltage (VDD3) : -0,3 4,5V
Digital Logic Supply Voltage (VDD) : -0,3 3V
Digital I/O Input Voltage (VIN) : -0,3 6,5V
I need connect these MCUs with SPI. It is possible when voltage level of the MC9S12NE64 pins is 3V and voltage level of MC9S08AW16 is 5V?
Added p/n to subject.
Message Edited by NLFSJ on 2007-12-31 06:52 AM
Message Edited by NLFSJ on 2007-12-31 07:15 AM