BCM20705 Datasheet, PDF (27/67 Pages) Cypress Semiconductor – Single-Chip Bluetooth Transceiver and Baseband Processor

BCM20705 Data Sheet
One-Time Programmable Memory
One-Time Programmable Memory
The BCM20705 includes a One-Time Programmable (OTP) memory, allowing manufacturing customization and
avoiding the need for an on-board NVRAM.If customization is not required, then the OTP does not need to be
programmed. Whether the OTP is programmed or not, it is disabled after the boot process completes to save
power.
The OTP size is 128 bytes.
The OTP is designed to store a minimal amount of information. Aside from OTP data, most user configuration
information will be downloaded into RAM after the BCM20705 boots up and is ready for host transport
communication. The OTP contents are limited to:
• Parameters required prior to downloading user configuration to RAM.
• Parameters unique to each part and each customer (i.e., the BD_ADDR, software license key, and USB
PID/VID).
The OTP memory is particularly useful in a PC design with USB transport capability because:
• Some customer-specific information must be configured before enumerating the part on the USB transport.
• Part or customer unique information (BD_ADDR, software license key, and USB PID/VID) do not need to
be stored on the host system.
Broadcom®
Bluetooth Transceiver and Baseband Processor
November 13, 2014 • MCS20705-DS104-R
Page 26
BROADCOM CONFIDENTIAL