CYW20705B0KWFBGT datasheet(25/67 Pages) CYPRESS

No de pièce	CYW20705B0KWFBGT

Description	Single-Chip Bluetooth Transceiver and Baseband Processor

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Fabricant	CYPRESS [Cypress Semiconductor]

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Microprocessor Unit

BCM20705 Data Sheet

BROADCOM CONFIDENTIAL

Broadcom®

Bluetooth Transceiver and Baseband Processor

November 13, 2014 • MCS20705-DS104-R

Page 24

Sec t ion 4: Mic r o p roce sso r Unit

Overview

The BCM20705 microprocessor unit runs software from the Link Control (LC) layer up to the Host Controller

Interface (HCI). The microprocessor is based on the ARM7TDMIS 32-bit RISC processor with embedded ICE-

RT debug and JTAG interface units. The microprocessor also includes 448 KB of ROM memory for program

storage and boot ROM, 132 KB of RAM for data scratch-pad, and patch RAM code.

The internal boot ROM provides flexibility during power-on reset to enable the same device to be used in various

configurations, including automatic host transport selection from SPI, USB, or UART, with or without external

NVRAM. At power-up, the lower layer protocol stack is executed from the internal ROM.

External patches can be applied to the ROM-based firmware to provide flexibility for bug fixes and features

additions. These patches can be downloaded from the host to the device through the SPI, USB, or UART

transports, or using external NVRAM. The device can also support the integration of user applications and

profiles using an external serial flash memory.

Note:

The BCM20705A1KWFBG part only contains 384 KB of ROM and 112 KB of RAM.

Numéro de pièce similaire - CYW20705B0KWFBGT

Fabricant	No de pièce	Fiches technique	Description
Cypress Semiconductor	CYW20705B0KWFBG	705Kb / 51P	Single-Chip Bluetooth Transceiver and Baseband Processor

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