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Signal Name

Function

CH_SEL[0]

Synchronous Signal for CODEC (For MOH#1/Page#1)

CH_SEL[1]

Synchronous Signal for CODEC (For MOH#2/Page#2)

CH_SEL[2]

Synchronous Signal for CODEC (For RMT)

CKE

Clock Enable: CKE signal for SDRAM

CKIO

Clock I/O For bus clock of SDRAM (IC505, IC506) and ASIC (IC102). CPU (IC200) outputs the clock of four times
frequency as many as Source clock (16.384MHz).

nCS0

Chip Select 0: Chip select signal for flash memory

nCS1

Chip Select 1: Chip select signal for BUS-M Card

nCS2

Chip Select 2: Chip select signal for SDRAM

nCS3

Chip Select 3: Chip select signal for the expanded SDRAM (Future Option, Reserve at present.)

nCS4

Chip Select 4: Chip select signal for SRAM

nCS5

Chip Select 5: Chip select signal for ASIC

nCS6

Chip Select 6: Chip select signal for USB I/F, SD card I/F and SD card I/F

nCS_FLASH

Chip Select for Flash memory CS signal for IC503

nCS_SDB

Chip Select for SD card I/F

nCS_SRAM0

Chip Select for SRAM0: CS signal for IC621

nCS_SRAM1

Chip Select for SRAM1: CS signal for IC622

nCS_USB

Chip Select for USB I/F

nCTS2

Clear To Send from RS-232C connector

CTS_RMT

Clear to Send: Flow signal for modem

CT_C8

Clock8.192MHz clock outputted from ASIC (IC102)

CT_D[7:0]

CT Data Bus: Two-way serial data bus to which the drive from any card is possible in the system.

CT_FRAME

Frame Signal: 8KHz frame signal outputted from ASIC (IC102)

CT_NETREF

Backup Synchronous Signal (MAX 2MHz) 8KHz signal output from

C_CS[0]

Chip Select For RMT (Reserved)

D[31:0]

Data Bus

nDACK0-1

DMA Acknowledge: For USB I/F

DCD

Data Carrier Detect

DCLK_RMT

Codec Clock (8MHz): For RMT

nDC_ALM

DC ALARM:DC alarm signal; Indicates the declined DC voltage. (L: Alarm condition)

DIN_RMT

Codec Data Input: For RMT (Reserved)

DOUT_RMT

Codec Data Output: For RMT (Reserved)

nWE[0:3]

Data Input/Output Mask (Write Enable): DQM signal for SDRAM and WE signal for each memory IC and ASIC
nWE1, nWE2, nWE3

nDREQ0-1

DMA Request: For USB I/F

DSR2

Data Set Ready from RS-232C connector

DSR_RMT

Data Set Ready from RS-232C connector

DTR2

Data Terminal Ready to RS-232C connector

EC_AD[15:0]

Address of EC Synchronous Bus, Data Bus (4MHz)

EC_nCBE[1:0]

EC Bus Command/Byte Enable: The initiator drives as bus command in the address phase and as byte enable in the
data phase.

EC_nCDET

EC Line Card Detection Signal Asynchronous interrupting signal

EC_CLK

Clock of EC Synchronous Bus (8MHz) All the EC bus signal except nRESET/EC_INT operates in sync with this
signal.

EC_nFRAME

EC Cycle Frame Signal: This indicates the drive by initiator and the execution of ECI bus cycle.

EC_nINT

EC Interrupting Signal: This is asserted, when slave interrupt occurs.

EC_PAR

Parity Bit of EC Synchronous Bus: Drive by applying even parity to AD[15:0] and CBE[1:0]. (4MHz)

EC_nPERR

EC Parity Error: Flag indicating error status by parity flag

EC_nRST

EC Reset Input: System reset input signal

EC_nSTOP

EC Bus Stop Signal: This is asserted, when target requests transaction halt to initiator.

EC_nTRDY

EC Target Ready Signal: This indicates the drive by target and the possible data transfer.

nFAN_ALM

Fan Alarm: It goes Low at the error of the L Power Supply’s FAN. It goes High when the FAN is normal and, Power
Supply M, which does not carry the FAN, are used.

HALT

This alarms the occurrence of the declined DC voltage to line card. H: Active L: Normal

nINIT

System Initialization Switch Input: L: At system initialization, H: At normal start-up

nIRQ_ASIC

Interrupt Request from ASIC: This indicates ASIC requests interrupt.

nIRQ_SDB

Interrupt Request from SD card I/F: This indicates SD card I/F requests interrupt.

nIRQ_BUSM

Interrupt Request from BUS-M card I/F: This indicates BUS-M card I/F requests interrupt.

nIRQ_USB

Interrupt Request from USB I/F: This indicates USB I/F requests interrupt.