MC71000 データシートの表示（PDF） - Motorola => Freescale

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MC71000

Bluetooth Baseband Controller

Motorola => Freescale 

Architectural Overview

The CRM is designed to make full use of the facilities supplied by the Bluetooth standard to conserve

power, while still maintaining a Bluetooth link. For this purpose, the CRM is connected to an on-chip

low-power oscillator, which generates a frequency using an external low cost 32.768 kHz crystal. The

CRM module also includes a watchdog to safeguard against any potential software failures.

4.3.2 Bluetooth Link Controller (BTLC)

The Bluetooth link controller module (BTLC) handles all link controller specific functions. Raw data can

be read from/written to the module, and the BTLC takes care of transmission related timing, as well as data

signal processing functions like encryption and cyclic redundancy check (CRC)/header error

correction (HEC) generation. Embedded in the BTLC are also the dedicated Bluetooth timers, which

maintain an accurate estimate of time in both the native and the remote module. A small and dedicated

Bluetooth serial peripheral interface controller handles all serial communication with the MC13180

Bluetooth RF Integrated Circuit.

4.3.3 Bluetooth Audio Signal Processor (BTASP)

Special attention has been put on audio quality for the end user. For this purpose, a dedicated Bluetooth

audio signal processing module (BTASP) has been designed to give users excellent and superior audio

performance. With a minimum of processor intervention, this module handles all filtering, interpolation, as

well as encoding/decoding (aLaw, uLaw, and CVSD).

4.3.4 High-Speed UART (up to 2 Mb/sec @ 24 MHz)

The Universal Asynchronous Receiver/Transmitter (UART) module provides one of the main interfaces to

the MC71000 Bluetooth Baseband Controller. The generated baud rate is based upon a configurable

divisor and input clock. It can be configured to send one or two stop bits as well as odd, even, or no parity.

The UART transmit and receive buffer sizes are 32 bytes each.

4.3.5 Dual High-speed CSPI (up to 2 Mb/sec @ 24 MHz)

The MC71000 Bluetooth Baseband Controller contains two configurable serial peripheral interface (CSPI)

modules, CSPI0 and CSPI1. CSPI0 can connect to a variety of SEEPROM and serial flash devices.

Both CSPI modules are master/slave configurable, equipped with 16 byte data out buffers (transmit and

receive FIFOs), and allow the MC71000 Bluetooth Baseband Controller to interface with external CSPI

master or slave devices. Incorporating the SPIRDY and SS control signals, it enables fast data

communication with a fewer number of software interrupts.

4.3.6 High-Speed SSI (up to 2 Mb/sec @ 24 MHz)

The synchronous serial interface module (SSI) is a full-duplex serial port allowing digital signal processors

(DSPs) to communicate with a variety of serial devices, including industry-standard CODECs, other DSPs,

microprocessors, and peripherals. The SSI is typically used to transfer samples in a periodic manner and

consists of a variety of registers that handle port, status, control, transmit and receive, serial clock

generation, and frame synchronization.

MOTOROLA

MC71000 Advance Information

5

Preliminary

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