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14

ME817EV BT817 Evaluation Board Datasheet

Version 1.0

Document No.: BRT_000325 Clearance No.: BRT#157

5 Hardware Setup

5.1 Power Configuration

There are 3 methods of powering the ME817EV board.

1) PC USB port Power(5V) - Connect to PC via Type-C cable to CN11

2) USBC charger Power(5V) - Connect USB charger with Type-C cable to CN6

3) Power from MCU host board(5V) - Connect 5V to CN8 pin 10 or CN7 pin 3&4

The following table summarises how to power the ME817EV board using the various methods.

Power Method

CN11

CN6

CN8 Pin 10

(or CN7 pin3&4)

JP1

PC USB port power (5V)

5V

Must not

connect

Don’t care

Short pin 1-2

USBC charger power (5V)

Don’t care

5V

Don’t care

open

MCU host board power (5V)

Don’t care

Must not

connect

5V

Short pin 2-3

Table 5-1 – Board power configuration

5.2 Backlight LED current Configuration

The ME817EV module has a backlight LED driver circuit on-board. The driver takes 5V as an input power

source, and the regulator produces the output voltage so that the desired total output current can be

drawn by the backlight LED. Users can select backlight current up to a maximum of 280mA via dip switch

SW1. By default, with all the 4 switches in SW1 turned OFF, resistor R44 (2.4 Ohm) is setting the

minimum backlight current at 120mA. The switches in S12 are connected to array resistor RP9 (4 x 7.5

Ohm). Turning ON each switch will provide an additional backlight current of 40mA per switch.

Backlight LED array

Vled voltage

Vled current

SW1 Number of

ON position

Comment

6 x 6

19.2V

120mA

0

8 x 3

9.6V

160mA

1

10 x 3

9.6V

200mA

2

12 x 3

9.6V

240mA

3

14 x 3

9.6V

280mA

4

Table 5-2 – Backlight LED configuration

5.3 Compatible LCD panel

The ME817EV supports 2 types of LCD interface:

1. LVDS panel with 40-pin 0.5mm FPC cable or connector

2. RGB panel with 50-pin 0.5mm FPC cable or connector

Table 5-3 lists a few LCD panels which have been tested as working with the ME817EV board.

Vendor

Part No

Size

Resolution

Display

Interface

Cap Touch IC

/Connector

Riverdi

RiTFT-70H-CAP

7”

1024x600

RGB-50

FT5426/CN2

EastRising

ER-TFT101-1

10.1”

1024x600

RGB-50

-

A-TOPS

AT-T101QIH-48CP

10.1”

1280x800

LVDS-40

GT928/CN12