BC352239A Datasheet, PDF (35/116 Pages) List of Unclassifed Manufacturers – BlueCore 3-Multimedia External

CSR Bluetooth Software Stacks
7 CSR Bluetooth Software Stacks
BlueCore3-Multimedia External is supplied with stack firmware which is compliant with the Bluetooth v1.2
specification and runs on the internal RISC microcontroller.
The BlueCore3-Multimedia External software architecture allows Bluetooth processing and the application
program to be shared in different ways between the internal RISC microcontroller and an external host processor
(if any). The upper layers of the Bluetooth stack (above HCI) can be run either on-chip or on the host processor.
7.1 BlueCore HCI Stack
HCI
LM
LC
32KB RAM
Baseband
MCU
Host
USB
UART
Host I/O
Radio
PCM / SPDIF / I²S
2
Microphone or Speaker
Digital Audio
Analogue Audio
Figure 7.1: BlueCore HCI Stack
In the implementation shown in Figure 7.1 the internal processor runs the Bluetooth stack up to the Host
Controller Interface (HCI). The Host processor must provide all upper layers, including the application.
BC352239A-ds-001Pc
© Cambridge Silicon Radio Limited 2004
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