User's Manual

Bluegiga Technologies Oy
Page 23 of 52
9 Bluetooth Stack Microcontroller
BT111 uses a 16-bit RISC MCU for low power consumption and efficient use of memory.
The MCU, interrupt controller and event timer run the Bluetooth software stack and control the Bluetooth radio
and host interfaces.
10 Programmable I/O Ports
See the Device Terminal Functions section for the list of supplies to the PIOs.
PIO lines are configured through software to have either weak or strong pull-ups or pull-downs. All PIO lines
are configured as inputs with weak pull-downs at reset and have additional individual bus keeper
configuration. The default configuration for all the IO pins is input with weak pull-up.
11 Wi-Fi Coexistence Interface
Dedicated hardware is provided to implement a variety of Wi-Fi coexistence schemes. There is support for:
 Channel skipping AFH
 Priority signaling
 Channel signaling
 Host passing of channel instructions
The BT111 supports the Wi-Fi coexistence schemes:
 Unity-3
 Unity-3e
 Unity+
Contact support ([e-mail]
) for more information