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CYW20705B0KWFBGT Fiches technique(PDF) 25 Page - Cypress Semiconductor |
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CYW20705B0KWFBGT Fiches technique(HTML) 25 Page - Cypress Semiconductor |
25 / 67 page 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 |
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Description similaire - CYW20705B0KWFBGT |
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