Freescale Semiconductor MPC5777C EVB User manual

Freescale
User’s Guide Document Number:
MPC5777CEVBUG
Rev. 0, 08/2015
MPC5777C EVB User Guide
Prototype Board
by: Kumar Sendhil
Automotive Micro-Controller Group
Austin, Texas USA
1. Introduction
This user guide details the setup and configuration
of the Freescale MPC5777C Evaluation Board
(hereafter referred to as the EVB). The EVB is
intended to provide a mechanism for easy
customer evaluation of the MPC57xx family of
microprocessors, and to facilitate hardware and
software development.
At the time of writing this document, the
MPC57xx family consists of the 55nm
powertrain and safety devices. For the latest
product information, please speak to your
Freescale representative or consult the MPC57xx
website at www.freescale.com.
The EVB is intended for bench or laboratory use
and has been designed using normal temperature
specified components (+70°C).
Contents
1. Introduction.....................................................................1
2. EVB Features.................................................................3
3. Configuration —Motherboard........................................4
4. Configuration —MPC5777C-416DS Daughter card ....13
5. Configuration —MPC5777C-516DS Daughter card ....26
6. Board Interface Connector ...........................................37
7. Default Jumper Summary Table...................................50
8. List of Acronyms...........................................................53
© Freescale, Inc., 2015. All rights reserved.

Freescale
2
Introduction
MPC5777C EVB User Guide, Rev. 0
1.1 Modular Concept
For maximum flexibility and simplicity, the EVB has been designed as a modular development platform.
The EVB main board does not contain an MCU. Instead, the MCU is fitted to an MCU daughter card
(occasionally referred to as an adapter board). This approach means that the same EVB platform can be
used for multiple packages and MCU derivatives within the MPC57xx family. High density connectors
provide the interface between the EVB and MCU daughter cards as shown Figure 1 See Section 4&5, “

Freescale
3
Introduction
MPC5777C EVB User Guide, Rev. 0
Configuration —MPC5777C-416DS Daughter card, Configuration —MPC5777C-516DS Daughter
card”for more details on the daughter cards and Section 6, “Board Interface Connector”for more details
on the interface connectors.
Figure 1: Modular concept –Mother Board (MB) and MCU daughter card
Please consult the MPC57xx website at www.freescale.com or speak to your Freescale representative for
more details on the availability of MCU daughter cards.
The EVB is designed to be used with the motherboard and standalone configurations
NOTE
For details on your specific daughter card, please consult the instructions
included with the daughter card.
1.2 Daughter Card Availability
A number of compatible daughter cards are available for the motherboard across a number of devices.
Table 1 gives an overview of daughter cards that can be used with MPC57xx motherboard (Part Number:
MPC5746MMB) and associated MPC5777C devices, package sizes and part numbers.
Table 1: Daughter Card Overview
Daughter card number
Device
Package
Socket
Nexus
MPC5777C-416DS
MPC5777C
416 BGA
Yes
Yes
MPC5777C-516DS
MPC5777C
516 BGA
Yes
Yes
All daughter cards will be similar in design and concept. For details on the daughter cards please refer to
Section 4&5, “

Freescale
4
Introduction
MPC5777C EVB User Guide, Rev. 0
Configuration —MPC5777C-416DS Daughter card, Configuration —MPC5777C-516DS Daughter card”.

Freescale
5
EVB Features
MPC5777C EVB User Guide, Rev. 0
2. EVB Features
The EVB system consists of a motherboard and a daughter card, both with distinct features.
The Mother Board provides the following key features:
•Support provided for different MPC57xx MCUs by utilizing MCU daughter cards
•Single 12 V external power supply input with four on-board regulators providing all of the
necessary EVB and MCU voltages; power supplied to the EVB via a 2.1mm barrel style power jack
or a 2-way level connector; 12 V operation allows in-car use if desired
•Master power switch and regulator status LEDs
•Two 240-way high-density daughter card expansion connectors allowing connection of the MCU
daughter card or a custom board for additional application specific circuitry
•All MCU signals readily accessible at a port-ordered group of 0.1inch pitch headers
•RS232/SCI physical interface and standard DB9 connector
•LINFlexD interface , Ethernet interface
•2 CAN interfaces, one configurable to be connected to one out of two CAN modules, and one
connected to a dedicated third CAN module
•Variable resistor, driving between 5 V and ground
•4 user switches and 4 user LEDs, freely connectable
• Liberal scattering of GND test points (surface mount loops) placed throughout the EVB
**Mother Board has FlexRAY connector, but this feature is not used on MPC5777C
The daughter cards provide the following features:
•MCU (soldered or through a socket)
•40MHz onboard clock oscillator circuit in EVB for MCU Clocking
•User reset switch with reset status LEDs and Power Indication LEDs
•Standard 14-pin JTAG debug connector and 50-pin SAMTEC Nexus connector
•USB (Type B) / UART transceiver to interface with MCU
•Liberal scattering of ground and test points (surface mount loops) placed throughout the EVB
•Power SBC for standalone function of Daughter Card
•1 CAN and 1 LIN connector supported by Power SBC
NOTE
To alleviate confusion between jumpers and headers, all EVB jumpers are
implemented as 2 mm pitch whereas headers are 0.1in. (2.54 mm). This
prevents inadvertently fitting a jumper to a header.
CAUTION
Before the EVB is used or power is applied, please fully read the following
sections on how to correctly configure the board. Failure to correctly
configure the board may cause irreparable component, MCU or EVB
damage.

Configuration—Motherboard
MPC5777C EVB User Guide, Rev. 0
6 Freescale
3. Configuration —Motherboard
This section details the configuration of each of the Mother Board functional blocks.
The Mother Board has been designed with ease of use in mind and has been segmented into functional
blocks as shown in Figure 2 Detailed silkscreen legend has been used throughout the board to identify
all switches, jumpers and user connectors.
Figure 2: Mother Board - Functional Blocks
3.1 Power Supply Configuration
The EVB requires an external power supply voltage of 12 V DC, minimum 1 A. This allows the EVB
to be easily used in a vehicle if required. The single input voltage is regulated on-board using three
switching regulators to provide the necessary EVB and MCU operating voltages of 5.0 V, 3.3 V, 1.25 V
and one 5 V linear regulator for the ADC supplies and references.
For flexibility there are two different power supply input connectors on the motherboard as detailed
below. There is also a power supply option on the daughter card to use the daughter card in standalone
mode. Please refer to Section 4.1.2, 4.1.3 “Daughter Card Standalone Power Input -External &
Daughter Card Standalone Power Input –Power SBC” for details on the daughter card power input.

Configuration—Motherboard
MPC5777C EVB User Guide, Rev. 0
7 Freescale
3.1.1Motherboard Power Supply Connectors
2.1 mm Barrel Connector –P26:
Figure 3: 2.1 mm Power Connector
2-Way Lever Connector –P33:
This can be used to connect a bare wire lead to the EVB, typically from a laboratory power supply.
The polarization of the connectors is clearly marked on the EVB. Care must be taken to ensure correct
connection.
Figure 4: Lever Power Connector
3.1.2Regulator Power Jumpers
There are four power regulator circuits on the MPC57xx motherboard that supply the required voltages
to operate the MCUs:
• 5V_SR: 5 V switching regulator to supply the power management controller, I/O and peripherals
• 3.3V_SR: 3.3 V switching regulator for Ethernet, debug and I/O
• 5V_LR: 5 V linear regulator for ADC supply and reference
All of the regulators have the option of being disabled/ enabled if they are not required. By default
(jumpers are off), all of the switching regulators are enabled and the 5 V linear regulator is disabled. The
regulators can be enabled individually by the following jumper settings:
• Connecting J57 enables the 5 V linear regulator
• Disconnecting J58 enables the 5 V switching regulator
• Disconnecting J59 enables the 3.3 V switching regulator
• Disconnecting J60 enables the 1.25 V switching regulator
The regulators supply power to the daughter cards through the board connector. The individual
selection and configuration of the MCU supplies are done on the daughter cards.

Configuration—Motherboard
MPC5777C EVB User Guide, Rev. 0
8 Freescale
NOTE
Not all the supported daughter card MCUs require all the supplies to be
switchedon.Please refertoSection 4,“

Configuration—Motherboard
MPC5777C EVB User Guide, Rev. 0
9 Freescale
Configuration —MPC5777C-416DS Daughter card”for details.
3.1.3Power Switch, Status LEDs and Fuse
The main power switch (slide switch SW5) can be used to isolate the power supply input from the EVB
Voltage regulators if required.
• Moving the slide switch to the right (away from connector P33) will turn the EVB on
• Moving the slide switch to the left (towards connector P33) will turn the EVB off
When power is applied to the EVB, four green power LEDs adjacent to the voltage regulators show
the presence of the supply voltages as follows:
• LED D9 –Indicates that the 5.0 V linear regulator is enabled and working correctly
• LED D11 –Indicates that the 5.0 V switching regulator is enabled and working correctly
• LED D12 –Indicates that the 3.3 V switching regulator is enabled and working correctly
• LED D13 –Indicates that the 1.25 V switching regulator is enabled and working correctly
If no LED is illuminated when power is applied to the EVB and the regulators are correctly enabled
using the appropriate jumpers, it is possible that either power switch SW5 is in the “OFF” position or
that the fuse F1 has blown. The fuse will blow if power is applied to the EVB in reverse-bias, where a
protection diode ensures that the main fuse blows rather than causing damage to the EVB circuitry. If
the fuse has blown, check the bias of your power supply connection then replace fuse F1 with a 20mm
1.5A fast blow fuse.
3.2 CAN Configuration
The EVB has two NXP TJA1041T high speed CAN transceivers and two standard DB9 connectors
to provide physical CAN interfaces for the MCU.
The pinout of the DB9 connectors (J5/J6) is shown in Figure 5.
Figure 5: CAN DB9 connector Pin out

Configuration—Motherboard
MPC5777C EVB User Guide, Rev. 0
10 Freescale
For flexibility, the CAN transceiver I/Os are also connected to two standard 0.1 in. connectors (P4 and P5)
at the top side of the PCB. The pin-out for these connectors is shown in Figure 6.
Figure 6: CAN 3pin header interface connector
By default the CAN interfaces are not enabled. To enable the CAN interfaces the jumpers detailed in
Table 2 need to be placed,
Table 2: CANcontroljumpers
Jumper
Label
Description
J23
CAN2_EN
PHY U2 configuration
1-2: WAKE to GND
3-4: STB to 5V
5-6: EN to 5V
J32
CAN2
1-2: PHY TX to MCU
3-4: PHY RX to MCU
J33
CAN-PWR
1-2: 5.0V_SR to PHY U2 VCC
3-4: 12V to PHY U2 VBAT
J34
—
PHY U2 signal out
1: ERR
2: INH
J21
CAN_EN
PHY U1 configuration
1-2: WAKE to GND
3-4: STB to 5V
5-6: EN to 5V
J35
CAN
1-2: PHY TX to J37-2
3-4: PHY RX to J38-2
J37
CAN
PHY U1 TX to MCU
1-2: MCAN1 TX
2-3: TTCAN TX
J38
—
PHY U1 RX to MCU
1-2: MCAN1 RX
2-3: TTCAN RX
J36
—
PHY U1 signal out
1: ERR
2: INH

Configuration—Motherboard
MPC5777C EVB User Guide, Rev. 0
11 Freescale
3.3 RS232 Configuration
DB9 connector J19 and TR3221 RS232 transceiver device provide a physical RS232 interface,
allowing a direct RS232 connection to a PC or terminal.
The pin-out of these connectors is detailed in Figure 7 Note that hardware flow control is not supported on
this implementation.
Figure 7: RS232 physical interface connector
On default the RS232 interface is not enabled. To enable the RS232 interface the user needs to place
the jumpers detailed in Table 3.
Table 3: RS232controljumpers
Jumper
Label
Description
J13
SCI TX
TX enable
J14
SCI RX
RX enable
J25
SCI_PWR
Transceiver power on
3.4 LIN Configuration
The EVB is fitted with a Freescale MC33662LEF LIN transceiver (U50) and two different style
connectors: A standard LIN Molex connector (J4) at the edge of the board and a standard 0.1 in.
connector (P3).
The pin-out of the Molex connector J4 is shown in Figure 8.

Configuration—Motherboard
MPC5777C EVB User Guide, Rev. 0
12 Freescale
Figure 8: LIN Molex connector
For flexibility, the LIN transceiver is also connected to a standard 0.1 in. connector (P3) at the top side
of the PCB as shown in Figure 9. For ease of use, the 12 V EVB supply is fed to pin1 of P3 and the
LIN transceiver power input to pin2. This allows the LIN transceiver to be powered directly from the
EVB supply by simply linking pins 1 and 2 of connector P3 using a 0.1 in. jumper shunt.
Figure 9: LIN 4pin header interface connector
By default the LIN interface is not enabled. To enable the LIN interface the jumpers detailed in
Table 4 need to be placed.
Table 4: LIN control Jumpers
Jumper
Label
Description
J15
LIN_EN
LIN PHY (U50) enable
J16
LIN_RX
LIN RX enable
J17
LIN_TX
LIN TX enable
3.5 Ethernet Configuration
The EVB is fitted with a standard RJ45 Ethernet connector (J7) and a DP83848C 10/100
Ethernet transceiver (U6).
By default, the Ethernet interface is enabled. The Ethernet interface the jumpers are detailed in
Table 5.

Configuration—Motherboard
MPC5777C EVB User Guide, Rev. 0
13 Freescale
Table 5: Ethernetcontroljumpers
Jumpe
r
Description
J22
PHY power(3.3V_SR) on (jumper
placed on default)
J18
RXCLK
J20
CRS_LEDCFG
J24
RXER_MDIXEN
J26
RXDV_MIIMODE
J39
RXD0_PHYAD1
J40
RXD1_PHYAD1
J41
RXD2_PHYAD2
J42
RXD3_PHYAD3
J44
COL_PHYAD0
J45
TXEN
J46
TXCLK
J47
TXD0
J48
TXD1
J49
TXD2
J50
TXD3_SNIMODE
J51
MDC
J52
MDIO
3.6 User Area
There is a rectangular prototype area on the EVB top right corner, consisting of a 0.1in. pitch array of
through-hole plated pads. Power from all the three switching regulators is readily accessible along
with GND through JP1 –JP16 next to the prototyping area. This area is ideal for the addition of any
custom circuitry.
There are four active low user LEDs D2, D3, D4 and D5, these are driven by connecting a logic 0
signal to the corresponding pin on 0.1in. header P7 (USER LEDS). The LED inputs are pulled to
VDD_HV_IO_MAIN through 10 kresistors.
There are 4 active high pushbutton switches SW1, SW2, SW3 and SW4 which will drive 5V onto the
respective pins on 0.1in. Connector P6 when pressed. The switch outputs are pulled to GND via 10
k.
Potentiometer RV1 can be connected to port pin PB[0] via J53 and is adjustable between GND and 5 V
from the linear regulator. Power from all regulators can be connected to port pins as through J54:
• 1-2: 1.25V_SR to PB[1]
• 3-4: 3.3V_SR to PB[2]
• 5-6: 5.0V_SR_SR to PB[3]
• 7-8: 5V_LR to PB[4]
The P12V rail from the 12 V input is scaled to 4.3V through the voltage divider of R81 and R82 and
the scaled voltage can be connected to PB[5] via J55.

Configuration—Motherboard
MPC5777C EVB User Guide, Rev. 0
14 Freescale

Configuration—Motherboard
MPC5777C EVB User Guide, Rev. 0
15 Freescale
3.7 Test points —Motherboard
A number of test points of different shape and functionality is scattered around the EVB to allow
easy access to MCU and reference signals. This chapter summarizes and describes the available test
points. Motherboard test points are listed and detailed in Table 6.
Table 6: TestPoints-MotherBoard
Signal
TP name
Shape
Description
GND
GT1
Hook
Ground reference
GND
GT2
Hook
Ground reference
GND
GT3
Hook
Ground reference
GND
GT4
Hook
Ground reference
GND
GT5
Hook
Ground reference
GND
GT6
Hook
Ground reference
GND
GT7
Hook
Ground reference
GND
GT8
Hook
Ground reference
GND
GT9
Hook
Ground reference
GND
GT10
Hook
Ground reference
GND
GT11
Hook
Ground reference
1.25V_SR
JP1
Pin
1.25V_SR reference
1.25V_SR
JP2
Pin
1.25V_SR reference
1.25V_SR
JP3
Pin
1.25V_SR reference
1.25V_SR
JP4
Pin
1.25V_SR reference
3.3V_SR
JP5
Pin
3.3V_SR reference
3.3V_SR
JP6
Pin
3.3V_SR reference
3.3V_SR
JP7
Pin
3.3V_SR reference
3.3V_SR
JP8
Pin
3.3V_SR reference
5V_SR
JP9
Pin
5V_SR reference
5V_SR
JP10
Pin
5V_SR reference
5V_SR
JP11
Pin
5V_SR reference

Configuration—Motherboard
MPC5777C EVB User Guide, Rev. 0
16 Freescale
Signal
TP name
Shape
Description
5V_SR
JP12
Pin
5V_SR reference
GND
JP13
Pin
Ground reference
GND
JP14
Pin
Ground reference
GND
JP15
Pin
Ground reference
GND
JP16
Pin
Ground reference
5V_SR
TP15
Hook
5V_SR reference
5V_LR
TP14
Hook
5V_LR reference
3.3V_SR
TP16
Hook
3.3V_SR reference
1.25V_SR
TP17
Hook
1.25V_SR reference
FRA-INH2
TP5
Pad
Unused
FRA-INH1
TP1
Pad
Unused
FRA-ERRN
TP2
Pad
Unused
FRA-RXEN
TP6
Pad
Unused
FRB-INH2
TP7
Pad
Unused
FRB-INH1
TP3
Pad
Unused
FRB-ERRN
TP4
Pad
Unused
FRB-RXEN
TP8
Pad
Unused
FR_DBG0
TP10
Pad
Unused
FR_DBG1
TP11
Pad
Unused
FR_DBG2
TP12
Pad
Unused
FR_DBG3
TP13
Pad
Unused
FEC 25MHz
TP9
Pad
Ethernet
clock

Configuration—Daughter Cards
MPC5777C EVB User Guide, Rev. 0
17 Freescale
4. Configuration —MPC5777C-416DS Daughter card
This section details the configuration of each of the MPC5777C-416DS daughter card’s functional
blocks.
The daughter card has been designed with ease of use in mind and has been segmented into functional
blocks as shown in Figure 10. Detailed silkscreen legend has been used throughout the board to
identify all switches, jumpers and user connectors.
Figure 10:MPC5777C-416DS Daughter card —functional blocks

Configuration—Daughter Cards
MPC5777C EVB User Guide, Rev. 0
18 Freescale
4.1 MCU Power
4.1.1Supply Routing and Jumpers
The different MCU supplies are connected to the regulators on the Mother Board through the
interface connector. Also daughter card has option to connect MCU supplies to either Mother Board
supplies or onboard regulators. Figure 11 shows how the MCU power domains are connected to the
regulators.
Figure 11:Daughter card power distribution

Configuration—Daughter Cards
MPC5777C EVB User Guide, Rev. 0
19 Freescale
Available power supply modes of MPC577C are listed in Table 7
Table 7: Power modes of MPC5777C
Configuration
Mode
Name
3.3V Flash
Supply
1.2V
Regulator
controller
REGSEL
VDDFLA
VDDPMC&V
DDPWR
Internal 3.3V Flash regulator with
1.2V linear regulator controller
LDO5V
Internal
Regulator
Internal Linear
Mode
Low/GND
Bypass caps
External 5V
supply
Internal 3.3V regulator with 1.2V
SMPS regulator controller
SMPS5V
Internal
Regulator
Internal SMPS
High/5V
Bypass caps
External 5V
supply
External 3.3V regulator with
internal 1.2V linear regulator
controller
LDO3V
External
Internal Linear
Mode
Low/GND
External
3.3V supply
External 3.3V
supply
External 3.3V regulator with
internal 1.2V SMPS regulator
controller
SMPS3V
External
Internal SMPS
High/3.3V
External
3.3V supply
External 3.3V
supply
External supplies with on-chip
low voltage detect
External
External
External
Supply
Low/GND
External
3.3V supply
External 3.3V
supply
External supplies, except flash
powered by internal regulator
External
Internal
Regulator
External
Supply
Low/GND
Bypass caps
External 5V
supply
Jumper options to achieve the above power supply modes are shown in Table 8:
Table 8: Jumper options for various power modes
Mode
name
J17
(REGSEL_TO
_GND)
J26
(VDDFLA_SEL)
J16
(VDDPWR_SE
L)
J18
(VDDPMC_SE
L)
J19
(REGCTL_SE
L)
J21
(1V25_SR_MB_SEL)
LDO5V
2&3 -GND
OPEN - Bypass
caps
2&3 - 5V_SR
2&3 - 5V_SR
2&3 for LV
Linear
Regulator
3&4 for
1.25V_SR_OB1 (LR)
SMPS5V
1&2 - HIGH -
5V
OPEN - Bypass
caps
2&3 - 5V_SR
2&3 - 5V_SR
1&2 for LV
SPMS
5&6 for
1.25V_SR_OB2(SR)
LDO3V
2&3 -GND
CLOSED -
VDDPWR&
VDDPMC
1&2 - 3V3_SR
1&2 - 3V3_SR
2&3 for LV
Linear
Regulator
3&4 for
1.25V_SR_OB1 (LR)
SMPS3V
1&2 - HIGH -
3V3
CLOSED -
VDDPWR&
VDDPMC
1&2 - 3V3_SR
1&2 - 3V3_SR
1&2 for LV
SPMS
5&6 for
1.25V_SR_OB2(SR)
External
2&3 -GND
CLOSED -
VDDPWR&
VDDPMC
1&2 - 3V3_SR
1&2 - 3V3_SR
N/C
1&2 for 1.25V_SR_MB
7&8 for SBC_1V25
External
2&3 -GND
OPEN - Bypass
caps
2&3 - 5V_SR
2&3 - 5V_SR
N/C
1&2 for 1.25V_SR_MB
7&8 for SBC_1V25

Configuration—Daughter Cards
MPC5777C EVB User Guide, Rev. 0
20 Freescale
The connection of any power domain to a regulator has to be enabled by a dedicated jumper as
described in Table 9.
Table 9: MCU power selection jumpers
Jumper
Description
Jumper Setting (* - Default)
J1
3.3V Selection
1-2: 3.3V from onboard Power SBC
2-3: 3.3V from Mother Board*
J2
5V Selection
1-2: 5V from onboard Power SBC
2-3: 5V from Mother Board*
J3
IO Levels in the Mother
Board - VDD_HV_IO_MAIN
1-2: Select 3.3V
2-3: Select 5V*
J5
ADC Analog Supply
Selection
1-2: Select 5V from Linear Regulator*
2-3: Select 5V from Switching Regulator
J6
Connect TRNG, Internal RC
oscillator Supply -
VDDA_MISC
1-2: Connect VDDA_MISC to 5V_SR*
J7 & J8
Connect SD ADC supply &
Reference –VDDA_SD,
VRH_SD
J7, 1-2: Connect VDDA_SD*
J8, 1-2: Connect VRH_SD*
J9 & J10
Connect eQADC supply &
Reference –VDDA_EQ,
VRH_EQ
J9, 1-2: Connect VDDA_EQ*
J10, 1-2: Connect VRH_EQ*
J14
Fast I/O Pads supply
selection - VDDE2
1-2: Select 3.3V*
2-3: Select 5V
J15
RAM Standby supply
selection -VSTBY
1-3: Select 3.3V
5-3: Select GND*
4-3: Select 5V
J16
SMPS Driver Supply
Selection - VDDPWR
1-2: Select 3.3V
2-3: Select 5V*
J17
Core Supply generation,
Regulation Mode - REGSEL
1-2: Select SMPS Configuration (VDD_PMC)
2-3: Select Linear Configuration (GND)*
J18
PMC Supply Selection –
VDDPMC
1-2: Select 3.3V
2-3: Select 5V*
J19
Core Supply generation,
Regulator Control -REGCTL
1-2: Select SMPS to derive (1.25V_SR_OB2)
2-3: Select Linear to derive (1.25V_SR_OB1)*
J21
VDD Core Supply
Selection
1-2: 1.25V from Mother Board*
3-4: 1.25V onboard Regulator (Linear Mode)
5-6: 1.25V onboard Regulator (Switching Mode)
7-8: 1.25V from onboard Power SBC
J24
Medium I/O Pads supply
selection –VDDEH3A
1-2: Select 3.3V
2-3: Select 5V*
J26
Connect Flash Core Supply
- VDDFLA
1-2: Connect VDDFLA to 3.3V_SR
J28
Fast I/O Pads supply
selection - VDDE2A
1-2: Select 3.3V*
2-3: Select 5V
J29
Medium I/O Pads supply
selection - VDDEHx
1-2: Select 3.3V
2-3: Select 5V*