KX-NCV200BX, KX-TVM204X, KX-TVM296X (serv.man3) - Panasonic PBX Service Manual (repair manual). Page 11

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On the main board are: the system control components consisting of the CPU, ROM, RAM, ASIC; external interfaces such as
LAN, USB, and HDD interfaces; modem and slot card optional interfaces; and power supply control unit.

BLOCK

SPECIFICATIONS

MAP No.

DESCRIPTIONS

CPU

Hitachi SH7706
SH3 Core RISC-micro processor

IC111

Core frequency: 131.072MHz
Bus frequency: 65.536MHz

ROM

8Mbit x 1

IC105

8Mbit Nor-Flash ROM

RAM

128Mbit x 1

IC106

32Mbyte SDRAM
4Mx16bit x 4bank
cycle time<75nS

ASIC
(iVDC)

Intelligent Voice & Peripheral
Device Controller (Custom LSI for
PCC Voice mail system)

IC112

Operation Frequency: 65.536MHz 

SRAM

8Mbit x 1
Voice data buffer

IC113

512kbit x 16

LAN

Driver: SMSC LAN 91C113

IC144

16bit 10/100 Non-PCI
Ethernet
Frequency: 25MHz

USB

RUNESAS M66591

IC145

USB2.0 Peripheral controller
Frequency: 24MHz

Local Bus Gate

Local Bus Gate & Gate control

IC161, IC109,

IC101~IC104
IC169, IC171

 IC122, IC123

Gate control of the primary bus only for SDRAMs and the
secondary bus only for local devices is performed.

Slot Interface Circuit

Slot Interface Circuit for 4-port Digi-
tal Interface Card (KX-TVM204)

CN105, CN106

8bit data bus, Voice data serial bus, card select signal, con-
trol signal, Card power

HDD Interface Circuit

ATA interface

-

40pin 3.5"HDD ATA interface 

Modem Cardslot

Modem card option slot

CN104

The  serial transceiver signal for modem card control, a
reset control signal, and a power supply.

DC-DC Converter Circuit

3.3v for main card
1.9v for CPU core power
1.9vB for CPU RTC
3.3v for slot card
12v for HDD motor power
5v for HDD Logic power

-

3.3v: DC-DC converter
1.9v: DC-DC converter
1.9vB: Regulator
12V: DC-DC converter
5V: DC-DC converter

BLOCK

SPECIFICATIONS

MAP No.

DESCRIPTIONS

4-Port Digital interface

4-Port DPT interface

CN702A
CN702B

2 DSP + 2 DPT interface