Specifications

Bluegiga Technologies Oy
2 Block diagram
RAM
Baseband
DSP
MCU
Kalimba DSP
2.4
GHz
Radio
I/O
BC05-MM
XTAL
Balanced
filtter
Antenna
Flash
UART/USB
PIO
Audio In/Out
PCM/I
2
S
SPI
Reset
circuitry
Figure 1: Block Diagram of WT32i
BC05-MM
The BlueCore®5-Multimedia External is a single-chip radio and baseband IC for Bluetooth 2.4GHz systems. It
provides a fully compliant Bluetooth v3.0 specification system for data and voice. BlueCore5-Multimedia
External contains the Kalimba DSP coprocessor with double the MIPS of BlueCore3-Multimedia External,
supporting enhanced audio applications.
XTAL
Ther reference clock of WT32i is generated with 26 MHz crystal. All BC05-MM internal digital clocks are
generated using a phase locked loop, which is locked to the frequency of either the 26 MHz crystal or an
internally generated watchdog clock frequency of 1kHz.
RESET CIRCUITRY
The internal reset circuitry keeps BC05-MM in reset during boot in order for the supply voltages to stabilize.
This is to prevent corruption of the flash memory during booting. Please see chapter 5.1 for more detailed
description.
BALANCED FILTER
The internal balanced filter provides optimal impedance matching and band pass filtering in order to achieve
lowest possible in-band and out-of-band emissions.
ANTENNA
The antenna is a ceramic chip antenna with high efficiency. The antenna is insensitive to surrounding
dielectric materials and requires only a small clearance underneath which makes it compatible with previous
WT32I designs and well suitable for designs with high density.
FLASH
16 Mbit flash memory is used for storing the Bluetooth protocol stack and Virtual Machine applications. It can
also be used as an optional external RAM for memory-intensive applications.