KX-NCV200BX, KX-TVM204X, KX-TVM296X (serv.man3) - Panasonic PBX Service Manual (repair manual). Page 15

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The system uses an ASIC called iVDC (Intelligent Voice & Peripheral Device Controller), which comprises the voice processing
engine of the PCC voice mail system, run in combination with an SH microprocessor and TI DSPs. This ASIC allows the send-
ing and receiving of 24 channels of audio serial data with 12 DSPs and enables data exchange with the HDD through buffer
memory. Necessary logic is imbedded to control other peripheral devices, HDLC, and VM-Link interfaces.

Module Name

Function

Serial Communication Clock Module

Generates bus timing of three types of McBSP0 based interfaces (DPT, APT, VM-Link).
Generates bus timing of McBSP1 based interfaces.

VM-Link Interface Module

PBX interface function and bridge function with McBSP0.

VM-Link Interface Module

Communicates with DSP through McBSP1. Sends and receives the compressed voice data. Controls
voice data by the voice buffer interrupt.

HDLC Module

HDLC  function  consisting  of serial packet switching managing Bch and Dch HDLC and their host
points. 

SRAM Interface Module

Manages timing of SRAM for external connection voice buffer.

Host CPU Interface Module

Access  to  the  CPU control register group, voice buffer access, external device access control,
addressing of external devices such as DSP, ECO, LAN, and USB.

Cch Interrupt Control Module

Cch interrupt function during DPT.

DSP Control Module

Manages and controls DSP interrupt.

Terminal Name

Number of Terminals

System Terminal

2

SH-CPU Interface Terminal (Access Control Terminal)

47

SH-CPU Interface Terminal (Interrupt Terminal)

4

External Device Control Terminal (General-purpose Port)

6

External Device Control Terminal (External Chip Select)

3

External Device Control Terminal (HDD Interface)

2

External Device Control Terminal (DSP)

30

External Device Control Terminal (DPT (ECO) )

16

SRAM Interface Terminal

39

McBSP0 Timing Control Terminal

13

McBSP1 Timing Control Terminal

14

VM-Link Interface Terminal

4

McBSP0 Data (VM-Link Bridge)

2

McBSP1 Data

2

HDLC External Connection Terminal

4

Cch Interrupt

2

Mode Terminal and User Test Terminal

3

JTAG Terminal

5

Development code name

iVDC

Wafer manufacturer

Fujitsu

ASIC specification

0.35 

µþm Embedded Cell Arrays

Number of pins

256

Power-supply voltage

+3.3V

Package

QFP

Operating frequency

65.536MHz for logics and PCM clocks