CP3BT23_14 Datasheet, PDF (97/324 Pages) Texas Instruments – CP3BT23 Reprogrammable Connectivity Processor with Bluetooth and Dual CAN Interfaces

CP3BT23
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SNOSCX3A – JULY 2013 – REVISED JANUARY 2014
15 Bluetooth Controller
The integrated hardware Bluetooth Lower Link Controller (LLC) complies to the Bluetooth Specification
Version 1.1 and integrates the following functions:
• 4.5K-byte dedicated Bluetooth data RAM
• 1K-byte dedicated Bluetooth Sequencer RAM
• Support of all Bluetooth 1.1 packet types
• Support for fast frequency hopping of 1600 hops/s
• Access code correlation and slot timing recovery circuit
• Power Management Control Logic
• BlueRF-compatible interface to connect with National’s LMX5252 and other RF transceiver chips
For a detailed description of the interface to the LMX5252, consult the LMX5252 data sheet which is
available from the Texas Instruments wireless group. National provides software libraries for using the
Bluetooth LLC. Documentation for the software libraries is also available from Texas Instruments.
15.1 RF INTERFACE
The CP3BT23 interfaces to the LMX5251 or LMX5252 radio chips though the RF interface.
Figure 15-1 shows the interface between the CP3BT23 and the LMX5251 radio chip.
VCC
+2.8V
IOVCC
VDD_DIG_IN
IOVCC
VCC
RFDATA
TX_RX_DATA
RFDATA
BBDATA_1
PG0/RFSYNC
CP3BT23
PG1/RFCE
TX_RX_SYNC
LMX5251
CE
PG1/RFCE
CP3BT26
PG2/BTSEQ1
BXTLEN
LMX5252
BPKTCTL
PG3/SCLK
CCB_CLOCK
PG3/SCLK
BDCLK
PG4/SDAT
CCB_DATA
PG4/SDAT
BDDATA
PG5/SLE
CCB_LATCH
PG5/SLE
BDEN#
X1CKI/BBCLK
BBP_CLOCK
X1CKI/BBCLK
BRCLK
DS220
Figure 15-1. LMX5251 Interface
DS320
Figure 15-2. LMX5252 Interface
The CP3BT23 implements a BlueRF-compatible interface, which may be used with other RF transceiver
chips.
15.1.1 RF Interface Signals
The RF interface signals are grouped as follows:
• Modem Signals (BBCLK, RFDATA, and RFSYNC)
• Control Signal (RFCE)
• Serial Interface Signals (SCLK, SDAT, and SLE)
• Bluetooth Sequencer Status Signals (BTSEQ1, BTSEQ2, and BTSEQ2)
X1CKI/BBCLK
clock signal. The radio chip uses this signal internally as the 12× oversampling clock and provides it
externally to the CP3BT23 for use as the Main Clock.
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Bluetooth Controller
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