Renesas M32R/ECU Series User Manual page 677

15
(3) When ports and memory are connected at 5 V and 3.3 V, respectively
Ports and memory can be connected with external circuits via a 5 V interface directly as is and a 3.3 V
interface, respectively.
3.3V
Figure 15.6.3 When Port and Memory are Connected at 5 V and 3.3 V, Respectively
(4) When both port and memory are connected at 3.3 V
Ports and memory can be connected with external circuits via 3.3 V interfaces.
3.3V
Figure 15.6.4 When Both Port and Memory are Connected at 3.3 V
15.6 Example of Bus Voltage Settings Using VCC-BUS
5V
M32R/ECU
VCCE
VDDE
OSC-VCC
VCC-BUS
M32R/ECU
VCCE
VDDE
OSC-VCC
VCC-BUS
EXTERNAL BUS INTERFACE
Port
Connected at 5 V
Memory
3.3V
Bus
VCC
Port
Connected at 3.3V
Memory
3.3V
Bus
VCC
15-22
3.3V
3.3V
32180 Group User's Manual (Rev.1.0)