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IDT82V2081

SINGLE CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT

Integrated Device Technology 

SINGLE CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT

INDUSTRIAL

TEMPERATURE RANGES

Table-1 Pin Description (Continued)

Name

Type

Pin No.

Description

INT

O

20 INT: Interrupt Request

In software control mode, this pin outputs the general interrupt request for all interrupt sources. These interrupt sources can be

masked individually via registers (INTM0, 14H) and (INTM1, 15H). The interrupt status is reported via the registers (INTS0,

19H) and (INTS1, 1AH).

Output characteristics of this pin can be defined to be push-pull (active high or active low) or open-drain (active low) by setting

INT_PIN[1:0] (GCF, 02H).

RXTXM0

I

SCLK

I

RXTXM0

See RXTXM1 above.

25 SCLK: Shift Clock

In serial microcontroller interface mode, this signal is the shift clock for the serial interface. Configuration data on SDI pin is sam-

pled on the rising edge of SCLK. Configuration and status data on SDO pin is clocked out of the device on the falling edge of

SCLK if SCLKE pin is high, or on the rising edge of SCLK if SCLKE pin is low.

ALE

ALE: Address Latch Enable

In parallel microcontroller interface mode with multiplexed Intel interface, the address on AD[7:0] is sampled into the device on

the falling edge of ALE.

AS

AS: Address Strobe

In parallel microcontroller interface mode with multiplexed Motorola interface, the address on AD[7:0] is latched into the device

on the falling edge of AS.

LP1

SDI

I

WR

R/W

LP[1:0]: Loopback mode select

When the chip is configured by hardware, this pin is used to select loopback operation modes (Inband Loopback is not provided

in hardware control mode)

• 00= no loopback

• 01= analog loopback

• 10= digital loopback

• 11= remote loopback

24 SDI: Serial Data Input

In serial microcontroller interface mode, this signal is the input data to the serial interface. Configuration data at SDI pin is sam-

pled by the device on the rising edge of SCLK.

WR: Write Strobe

In Intel parallel multiplexed interface mode, this pin is asserted low by the microcontroller to initiate a write cycle. The data on

AD[7:0] is sampled into the device in a write operation.

R/W: Read/Write Select

In Motorola parallel multiplexed interface mode, this pin is low for write operation and high for read operation.

LP0

LP0

See LP1 above.

11

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