CC2640: CC2640

Haresh Prajapati

Prodigy 210 points

Part Number: CC2640

Hello to all,

Currently we have design BLE with use of CC2640.

Here attached cc2640 connections schematic so kindly review it give suggestion if its needed.

E1 :- U.F.L. connector

E2 :- 2450at18d0100E

U2:- 2450BM14G0011T

over 8 years ago

0 Ravikiran HV over 8 years ago

Mastermind 8715 points

Hope you got chance to look into reference schematic

0 Fredrik K over 8 years ago

TI__Guru** 106705 points

There should not be load capacitors on the 24 MHz crystal. The rest looks ok. Decoupling and DCDC components are not shown though.

Visit the BLE wiki for layout considerations: www.ti.com/ble-wiki

0 Haresh Prajapati over 8 years ago in reply to Fredrik K

Prodigy 210 points

Hello Fredrik Thanks for your reply,

Here i attached full schematic of cc2640.

Below mention Pin used with their configuration so i want to conform is it right or not. So,kindly verify it and share your input.

1.pin 22 (DIO_5) used as interrupt

2.pin 24 (DIO_7) used as PWM

Kindly let me know if i doing wrong.CC2640.PDF

0 Fredrik K over 8 years ago in reply to Haresh Prajapati

TI__Guru** 106705 points

Hi Haresh,

Digital peripherals can be mapped freely to IOs, so your signal configuration is fine.

In the schematic you seem to have removed R2 (series component between C10 and C11) which I would recommend that you keep for antenna tuning. I would also recommend completely removing C14 and C15 as this typically improves the layout.

Cheers,
Fredrik

0 Haresh Prajapati over 8 years ago in reply to Fredrik K

Prodigy 210 points

Hello Fredrik,

Thanks for your reply.

As per your suggestion we added Resistor we have add it but we have query we change antenna.

And we have used "AN043_PCB antenna" for our design.

So i will need resistor for future purpose?

0 Fredrik K over 8 years ago in reply to Haresh Prajapati

TI__Guru** 106705 points

Hi Haresh,

Yes, you might still need to do antenna tuning for the AN043 antenna also.

Cheers,
Fredrik

0 Haresh Prajapati over 8 years ago in reply to Fredrik K

Prodigy 210 points

Hello Fredrik,

Thanks for reply.

Your all input very help full for us.

Here i attached one image of our antenna section.

Kindly review it and share us it may very help full for us.

0 Fredrik K over 8 years ago in reply to Haresh Prajapati

TI__Guru** 106705 points

Hi Haresh,

From what I can see:

- Remove the ground plane in the yellow box

- Place more ground vias around the balun ground pins

- Place more ground vias by the DCDC output cap

- Do not use thermal relief on the antenna

Cheers,
Fredrik

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CC2640: CC2640