The programmer that he build has a nice slot for the module which interfaces with the programming lines using pogo pins (spring-loaded contacts). It connects to the CSR BC417 chip’s SPI pins in ...

The BC417 is the System on Chip found in the very popular BlueCore4-Ext Bluetooth module featuring 8Mbits of Flash (75% of which is used for Bluetooth related stuff), somewhere around 12 kB of RAM ...