Close

External memory pinout

A project log for Open source sport/smart watch

Make Weloop Tommy an open source sport watch that can connect directly to all kind of sensors (heart rate monitor and so on)

KrzysiekKrzysiek 03/15/2015 at 20:130 Comments

Weloop tommy has an external FLASH and RAM. According to product specification it's 16kB RAM and 512kB FLASH.

RAM pinout

It's easier to describe pinout than indicate a specific chip that's used. RAM looks like a microchip 23K640. Pinout is correct but available size is lower than expected. But that may be an error in specification. It looks like internal RAM size and external RAM size were swapped. Documentation for microchip 23K640 can be found HERE.

Chip pinout:

RAM pinNRF WLCSP pinNRF pin name
SCKJ6P0.11
SIJ5P0.12
SOJ7P0.09
CSB6P0.23


FLASH pinout

It's even harder to indicate flash chip model. If you know what chip it is please add a comment or write a message.

Update:
It's W25Q40CL. Documentation can be found HERE.

Chip pinout:

FLASH pinNRF WLCSP pinNRF pin name
SCKJ6P0.11
SIJ5P0.12
SOJ7P0.09
CSJ8P0.08
WPH6P0.10

Discussions