DOWNLOAD Panasonic KX-TDA6178X / KX-TDA6178XJ Service Manual ↓ Size: 2.85 MB | Pages: 67 in PDF or view online for FREE

Model
KX-TDA6178X KX-TDA6178XJ
Pages
67
Size
2.85 MB
Type
PDF
Document
Service Manual
Brand
Device
PBX / 24-PORT SINGLE LINE TELEPHONE EXTENSION CARD WITH CALLER ID
File
kx-tda6178x-kx-tda6178xj.pdf
Date

Panasonic KX-TDA6178X / KX-TDA6178XJ Service Manual ▷ View online

7
     KX-TDA6178X/KX-TDA6178XJ
• LED Operation status indicating LED (Two colors)
OFF: Fault
Red ON: Fault (RESET included)
Green ON: Normal (Line not in use)
Green Flash (60/minute): Normal (Line in use)
Orange: OUS (Because OUS needs to be controlled by MPR, reset terminal and port control terminal are Red Blinking: OUS to
generate OUS)
• Instantaneous power interruption operation
When instantaneous power interruption is 300msec or less, reset operation is not carried out because the voltage is retained by
the capacitor in the power supply.
After HALT from MPR is detected at the DC power down port, CPU goes into the sleep mode by executing the instruction of
SLEEP.
At the sleep mode, the CPU/Clock enters the halt state while the contents of the register, the internal RAM, and the I/O port are
maintained.
When the instantaneous power interruption is released, HALT is negated, and CPU is recovered to the normal mode by the
detection of IRQ0=L
8
KX-TDA6178X/KX-TDA6178XJ
5.2.2.
IC3 (ASIC)
• EC bus interface
Independent bus for 16bit/8MHz two-way address data multiplex.
• CT bus interface
Supports eight 8.192MHz highways (128 time slots).
• Local TSW
Exchanges the time slots between CT bus (1024ch) and local highway (64ch).
• Local highway interface
Accommodates 2.048, 4.096, and 8.192MHz highways (Up to 64 time slots).
• Local gain control
Controls the gain of the local highway up-and-down 64ch in 1db step arbitrarily.
9
     KX-TDA6178X/KX-TDA6178XJ
• CODEC interface
Can connect up to 12 Infineon-manufactured PEB3265, and is intended for enabling the line control.
• GPIO interface
Parallel interface that is arbitrarily programmable bidirectionally.
5.2.3.
CODEC Function (IC201A-X)
Infineon PEB3265 CODEC is installed. The analogue features such as BN, frequency characteristic, volume level, sidetone are
configured by FPGA CODEC interface DCLK, CS, DOUT, DIN. Also, it converts A/D to D/A, and 4-line-analogue signal to PCM
code in G.711 format. 
10
KX-TDA6178X/KX-TDA6178XJ
5.2.4.
2W-4W Conversion
It converts 4W-VOX signal used in the PBX to 2W-VOX signal used in SLT, and vice versa. It consists of an operational amplifier in
the SLIC and a balanced network (B/N) in the CODEC. It can control the return loss of the audio data and frequency characteristics.
By modifying the CODEC program, it can match the corresponding impedance. 
5.2.5.
DTMF Signal Detection
Each port has its own DTMF receiver in the codec. 
Detection of DTMF signal by Codec transmits this data to the MPR via the FPGA.
Via the FPGA, MPR reads the DTMF signal which is received in the Codec.
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