XRT83SL314 datasheet(8/83 Pages) EXAR

8 / 83 page

XRT83SL314

REV. 1.0.1

14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT

DATA7

DATA6

DATA5

DATA4

DATA3

DATA2

DATA1

DATA0

AA4

AB3

AC3

AA5

AB4

AC4

AB5

I/O

Bi-directional Data Bus

DATA[7:0] is a bi-directional data bus used for read and write operations.

µPTS2

µPTS1

µPTS0

AC23

AB22

AA21

Microprocessor Type Select Input

µPTS[2:0] are used to select the microprocessor type interface.

000 = Intel 68HC11, 8051, 80C188 (Asynchronous)

001 = Motorola 68K (Asynchronous)

111 = Motorola MPC8260, MPC860 Power PC (Synchronous)

Reset

B22

Hardware Reset Input

Active low signal. When this pin is pulled "Low" for more than 10µS, the inter-

nal registers are set to their default state. See the register description for the

default values.

NOTE: Internally pulled "High" with a 50K

Ω resistor.

CS5

CS4

CS3

CS2

CS1

B20

A21

C20

D19

B21

Chip Select Output

The XRT83SL314 can be used to provide the necessary chip selects for up to

5 additional devices by using the 3 MSBs ADDR[10:8] from the 11-Bit address

bus. The LIU allows up to 84-channel applications with only using one chip

select. See the ADDR[10:0] definition in the pin description.

RECEIVER SECTION

NAME

TYPE

DESCRIPTION

RxON

AB19

Receive On/Off Input

Upon power up, the receivers are powered off. Turning the receivers On or Off

can be selected through the microprocessor interface by programming the

appropriate channel register if the hardware pin is pulled "High". If the hard-

ware pin is pulled "Low", all channels are automatically turned off.

NOTE: Internally pulled "Low" with a 50K

Ω resistor.

RxTSEL

Y15

Receive Termination Control

Upon power up, the receivers are in "High" impedance. Switching to internal

termination can be selected through the microprocessor interface by program-

ming the appropriate channel register. However, to switch control to the hard-

ware pin, RxTCNTL must be programmed to "1" in the appropriate global

"High" to switch to internal termination.

NOTE: Internally pulled "Low" with a 50k

Ω resistor.

MICROPROCESSOR

NAME

TYPE

DESCRIPTION

XRT83SL314 Datasheet(PDF) 8 Page - Exar Corporation

XRT83SL314 Datasheet(HTML) 8 Page - Exar Corporation

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