Altec ISDN Socket Modem AL5068S-3V Manual de usuario descargar pdf (Pagina 12)

AL5068S Designer’s Guide

No. AL5068S-E00-105 Altec Electronic AG Seite 12 / 25

Table 3.2 / Signal Descriptions

Label

I/O

Type

Signal Name Description

VCC PWR +5 VDC / 3.3 VDC

GND GND Ground. Connect to Digital Ground on the interface circuit.

~RESET IC

Modem Reset. The Active Low ~RESET input resets the Socket Modems

logic and returns the AT command set to the original factory default

values and to “stored values” in NVRAM. ~RESET is connected to a built-

in reset circuit on the Socket Modem. This input is 5V tolerant.

TX+ S

Bus

Transmit Positive from ISDN S

Bus.

TX - S

Bus

Transmit Negative from ISDN S

Bus.

RX + S

Bus

Receive Positive from ISDN S

Bus.

RX - S

Bus

Receive Negative from ISDN S

Bus.

Table 3.3 / LED Interface Signal Descriptions

Label I/O Type Signal Name/Description

LED driver lines are open-drain inverter-driven (74HCT05) lines with 1.5 KΩ, 1/10W pull-up resistors.

DCDIND OG

Active High DCD Status

RXDIND OG

Active High RXD Status

DTRIND OG

Active High DTR Status

TXDIND OG

Active High TXD Status

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Altec ISDN Socket Modem AL5068S-3V Manual de usuario Pagina 12