Board Power Supply; Voltage Selection Jumpers - Renesas RC32012A Manual

RC32012A Evaluation Kit Manual
▪ SysDPLL Input (Optional) – An SMA connector, J46, is provided to supply a local OCXO/TCXO reference as
an optional reference for System DPLL.
▪ Crystal: A crystal of various frequencies must be present for board operations. A 3225 footprint is provided for
SMT crystals. For easy plug-in of a canned crystal, two through-holes are also available.
▪ EEPROM – An SO-8 socket is provided to hold an EEPROM device of compatible package. EEROM is used to
store firmware and customer configuration data, if needed.
1.1

Board Power Supply

The evaluation board uses a single +5V supply for its power supplies. When running the board, please set the
bench power supply at 5V/2A. The red jack (J1) is positive; the black jack (J2) is the ground.
Multiple LDOs are used to generate 3.3V, 2.5V, and 1.8V from the +5V supply.
1.2

Voltage Selection Jumpers

There are eight headers/jumpers for selecting different voltages for different functional blocks of the device. Each
header has Pin 1 and 3 labeled in silkscreen – jumping pin 1 and pin 2 will select 3.3V; jumping pin 2 and pin 3 will
select 2.5V. No jumper will have 1.8V.
Please see the following example for JP4 and JP9 – JP4 will select 2.5V, JP9 will select 3.3V.
The following list shows which head/jumper is used to select a specific voltage:
▪ JP1 – VDDD
▪ JP2 – VDDA
▪ JP3 – VCC_GPIO_DC
▪ JP4 – VDDO_Q8_3_5
▪ JP5 – VDDO_Q2_4_11
▪ JP6 – VDDO_1_10_7
▪ JP7 – VDD_CLK0
▪ JP9 – VDDO_Q0_9_6
R31UH0010EU0102 Rev.1.02
Apr 20, 2022
Figure 3. Example of Voltage Jumpers
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