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4 Technical Descriptions
4.1.
Circuit Configuration of TG764x Series Phones
TG764x consists of DECT cordless telephone and Bluetooth Module.
Both voices of transmission and reception are transferred by PCM.
BBIC on DECT side controls the cordless telephone system, which makes control data communication with BT_IC on BT
Module in serial data.
MIC
SPEAKER
TGA660
Handset
DECT6.0
Main PCB
BBIC
(IC501)
EEPROM IC611
FLASH IC601
(Data)
(TAM)
TEL I/F
POWER
PSTN
Cellular Phone
(For Link to Cell
communication)
Bluetooth
Control/Data
signal
(UART)
Audio signal
(PCM)
QSPI FLASH
IC502
(Program)
DC
5.5V
7
KX-TG155SK/KX-TGA660M
Bluetooth Devices
Bluetooth
BT_Module
(IC721)
Bluetooth
Headset
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