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EXTERNAL BUS INTERFACE
32180 Group User’s Manual (Rev.1.0)
15.6 Example of Bus Voltage Settings Using VCC-BUS
(1) When both port and memory are connected at 5 V
Ports and memory can be connected with external circuits via 5 V interfaces.
VCCE
VDDE
VCC-BUS
Bus
Connected at 5 V
5V
Memory
5V
VCC
OSC-VCC
M32R/ECU
Port
Figure 15.6.1 When Both Port and Memory are Connected at 5 V
(2) When ports and memory are connected at 3.3 V and 5 V, respectively
Ports and memory can be connected with external circuits via a 3.3 V interface directly as is and a 5 V
interface, respectively.
VCCE
VDDE
VCC-BUS
Port
Bus
Connected at 3.3 V
3.3V
5V
M32R/ECU
Memory
5V
VCC
OSC-VCC
Figure 15.6.2 When Port and Memory are Connected at 3.3 V and 5 V, Respectively
