XRT83VSH314 データシートの表示（PDF） - Exar Corporation

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XRT83VSH314

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

Exar Corporation 

XRT83VSH314

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

MICROPROCESSOR

REV. 1.0.1

NAME

PIN

TYPE

DESCRIPTION

ADDR10

ADDR9

ADDR8

ADDR7

ADDR6

ADDR5

ADDR4

ADDR3

ADDR2

ADDR1

ADDR0

A23

E20

C22

Y18

AA19

AB20

AC21

AB21

AA20

Y19

AC22

I

Address Bus Input

ADDR[10:8] is used as a chip select decoder. The LIU has 5 chip select output

pins for enabling up to 5 additional devices for accessing internal registers.

The LIU has the option to select itself (master device), up to 5 additional

devices, or all 6 devices simultaneously by setting the ADDR[10:8] pins speci-

fied below. ADDR[7:0] is a direct address bus for permitting access to the

internal registers.

ADDR[10:8]

000 = Master Device

001 = Chip Select Output 1 (Pin B21)

010 = Chip Select Output 2 (Pin D19)

011 = Chip Select Output 3 (Pin C20)

100 = Chip Select Output 4 (Pin A21)

101 = Chip Select Output 5 (Pin B20)

110 = Reserved

111 = All Chip Selects Active Including the Master Device

NOTE: Internally pulled "Low" with a 50k Ω resistor.

DATA7

DATA6

DATA5

DATA4

DATA3

DATA2

DATA1

DATA0

AA4

I/O

Bi-directional Data Bus

AB3

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

AC3

NOTE: Internally pulled "Low" with a 50k Ω resistor.

AA5

Y6

AB4

AC4

AB5

µPTS2

µPTS1

µPTS0

AC23

AB22

AA21

I

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)

NOTE: Internally pulled "Low" with a 50k Ω resistor.

Reset

B22

I

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 50KΩ resistor.

CS5

B20

O

Chip Select Output

CS4

A21

CS3

C20

CS2

D19

CS1

B21

The XRT83VSH314 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.

5

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