PCF87852

Baseband hardware
Embedded ARM7TDMI microprocessor
224 kbytes ROM memory
38 kbytes SRAM memory
8 kbytes internal data RAM (IRAM) for Bluetooth controller
Watchdog timer
Two 32-bit system timers
Bluetooth controller including scrambling, CRC generation and checking, FECencoding and decoding and ciphering according the "Specification oftheBluetooth System, Version 1.1"
Bluetooth connections supporting:
Maximum 3 active connections (ACL)
One voice connection (SCO).
CVSD transcoder
RF interface
RSSI measurement
On-chip 1.8 V voltage regulator
8-bit D/A and A/D conversion for various purposes; e.g. PA control
Power-on reset
System clock crystal oscillator
Low-power crystal oscillator for a low-frequency clock input
System clock request signal for control of external clock source
Microprocessor interfaces including UART, I2C-bus, combined PCM/IOM andgeneral purpose I/O-pins
Patch mechanism for code updates and corrections.
Firmware
Interface drivers
Bluetooth controller driver
Link Controller (LC)
Link Manager (LM)
Host Controller Interface (HCI)
L2CAP, RFCOMM and SDP
Small profiles and application software (i.e Bluetooth headset).
General
Core and interface supply: 1.8 V; RF interface supply: 2.7 V to 3.4 V
Operating temperature range: −40 °C to +85 °C
Package: LFBGA73 (7 * 7mm2 and 0.5 mm pitch).

The PCF87852 combines the Bluetooth™ protocol stack, Link Controller (LC), LinkManager (LM), and Host Controller Interface (HCI) firmware of the Bluetooth systemspecification in a single IC with embedded software. Together with an RF module, afew external components and an antenna it forms a Bluetooth system. In most casesthis module will be attached to a host, for example a GSM baseband controller or aPC processor. The PCF87852 may also be used for embedded Bluetoothapplications by running the upper software layers also from the on-chip memory.Together with an external voice codec a Bluetooth headset application can berealized.

The industry standard ARM7TDMI™ microcontroller PCF87852 with low power consumption isintegrated together with ROM memory and SRAM. There are no provisions forexternal controllers to directly access on-chip data memory. Communication with anexternal host, for example a PC, GSM or PDA, PCF87852 is handled via the HCI.Industry standard interfaces such as I2C-bus™, PCM and IOM® are supported byon-chip hardware. Additionally, a UART interface is available that can be used as theBluetooth host controller interface.

The Bluetooth controller consists of a number of functional blocks that operate undercontrol of the embedded microcontroller. The microcontroller has access to theseblocks via the AMBA System Bus (ASB) and the VLSI Peripheral Bus (VPB).

The PCF87852 is designed to be used together with an RF IC as low-cost,low-power, radio-based cable replacement or wireless link. This link will be the basisfor PCs, telephones, PDAs and peripherals to communicate together on an ad-hocbasis. PCF87852 will replace cables and enables a wireless personal network.

The PCF87852 is especially suited for applications without the need for analog voiceinput or output, e.g. cellular telephones or computing platforms.