Overview

STLC2690

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Description

The STLC2690 is a system-on-chip Bluetooth V2.1 + EDR transceiver and FM R(B)DS

transceiver designed in ST low-power 65 nm RFCMOS process. The chip is offered in a

Wafer Level Chip Scale Package (WLCSP) of 0.6 mm height and 0.4 mm pitch.

The Bluetooth part is ROM-based, for applications requiring integration up to HCI level.

Patch RAM is available, enabling multiple patches/upgrades and fast time to volume. The

main interfaces are UART, SPI or SDIO for HCI transport, PCM or I2S for voice and a WLAN

coexistence interface. The radio has been designed specifically for single chip requirements,

for low power and minimum BOM count.

The FM radio transceiver contains both a broadcast FM radio tuner and a FM transmitter for

portable applications with worldwide FM band support. (De)multiplexing and (de)modulation

are performed in a digital data path. A small embedded microcontroller manages the

flexibility of the data path and takes care of the overall control of the transceiver. This

microcontroller is also used for transmission and reception of the European Radio Data

System (RDS) and the North American Radio Broadcast Data System (RBDS), including all

required symbol decoding, block synchronization, error detection, and error correction

functions. The FM can be controlled by the Host via a dedicated I2C interface or via the

Bluetooth HCI interface. A Host-level API is offered in order to facilitate integration of the FM

driver on the Host. Also a low-level API is supported.

The Bluetooth transceiver and FM transceiver are integrated on the same silicon, and share

at top-level power supplies, clocks and reset control. The chip integrates several regulators

to generate the internally needed voltages from the Host platform supply input.

0201 components where possible, with a 0.3 mm spacing rule). The FM antenna matching

network, which depends on the specific antenna implementation, is included in this footprint.