Power/Reset Pins; Power-On/Off Sequence - Renesas R-IN32M4-CL2 User Manual

R-IN32M4-CL2 User's Manual: Board design edition
2.

Power/Reset Pins

2.1

Power-On/Off Sequence

Table 2.1 lists the external power supply to the R-IN32M4 and GbE-PHY. In addition, Figure 2.1 shows the power on/off
sequence. (GbE stands for Gigabit Ethernet.)
Though there is no specific order for supplying the power-supply voltages, we recommend supplying the VDD33
external power after supplying the VDD10 external power. Conversely, we recommend shutting down VDD10 after
VDD33.
If VDD33 is supplied first, the input/output modes of I/O buffer are unstable rather than fixed during the period from
VDD33 rising to VDD10 rising, and thus caution is required on this point.
Make sure to confirm that the power supply voltage is stable before applying 3.3 V to I/O pins.
Table 2.1 External Power Supply
External Power Supply
VDD33
VDD25
VDD10
R18UZ0046EJ0200
Dec. 28, 2018
Voltage[V] Power Supplied to
3.3±0.165 R-IN32M4
GbE-PHY
2.5±0.125 GbE-PHY
1.0±0.05 R-IN32M4
GbE-PHY
External Pin Name
VDD33, AVDD
VDD33_GPHY
VDD25A
VDD10
PLL_VDD
VDD1
VDD1A
2. Power/Reset Pins
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