XRT72L13 datasheet(202/370 Pages) EXAR

202 / 370 page

XRT72L13

áç

M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC

REV. P1.0.6

PRELIMINARY

190

Bit 7 - Local Loop-back Mode

This bit-field permits the user to configure the

XRT72L13 M13 device to operate in the “Local Loop-

back” Mode.

Setting this bit-field to “1” configures the XRT72L13

M13 chip to operate in the “Local Loopback” Mode.

Setting this bit-field to “0” configures the XRT72L13

M13 chip to not operate in the “Local Loopback”

Mode.

Bit 6 - Line Loopback Mode

This bit-field permits the user to configure the

XRT72L13 M13 device to operate in the “Line Loop-

back” Mode.

Setting this bit-field to “1” configures the XRT72L13

M13 chip to operate in the “Line Loopback” Mode.

Setting this bit-field to “0” configures the XRT72L13

M13 chip to not operate in the “Line Loopback” Mode.

Bit 5 - Internal LOS Enable

This “Read/Write” bit-field permits the user to config-

ure the XRT72L13 M13 chip to either declare an LOS

(Loss of Signal) condition, based upon the “Internal

Circuit’s” criteria or not.

Setting this bit-field to “0” configures the XRT72L13

M13 chip to NOT declare an LOS condition, based

upon its own internal criteria.

Setting this bit-field to “1” configures the XRT72L13

LOS condition, based upon its own internal criteria.

NOTES:

1. The XRT72L13 M13 chip will declare an “LOS”

condition anytime the RLOS input pin is set “high”

independent of the setting of this bit-field.

2. For more information on the XRT72L13 M13 chip’s

“internal criteria” for “Loss of Signal” please see

Section _.

Bit 4 - RESET

This “Read/Write” bit-field permits the user to com-

mand the XRT72L13 M13 chip into a software reset

state. If the XRT72L13 M13 chip is commanded into

the “RESET” state, all of its internal register bits will

automatically be set to their default condition.

The user can configure the XRT72L13 to operate in

the “RESET” state by inducing a “0” to “1” transition in

this bit-field.

Bit 3 - Interrupt Enable RESET

This “Read/Write” bit-field permits the user to config-

ure the XRT72L13 M13 chip to automatically disable

all Interrupts that are activated.

Setting this bit-field to “0” configures the XRT72L13

M13 chip to NOT disable the Interrupt Enable Status”

of any interrupt following their activation.

Setting this bit-field to “1” configures the XRT72L13

M13 to disable the Interrupt Enable Status” of any in-

terrupt following their activation.

For more information on this feature, please see Sec-

tion _.

Bit 2 - Frame Format Select

This “Read/Write” bit-field permits the user to select

the Framing format that the XRT72L13 M13 device

will be operating in.

Setting this bit-field to “0” configures the XRT72L13

M13 device to operate in the C-Bit Parity Framing

Format.

Setting this bit-field to “1” configures the XRT72L13

M13 device to operate in the M13 Framing Format.

Bits 1 and 0 - TimRefSel[1:0] - Timing Reference

Select

OPERATING MODE REGISTER (ADDRESS = 0X00)

BIT 7BIT 6BIT 5BIT 4BIT 3BIT 2BIT 1BIT 0

Local Loop-

back Mode

Line Loop-

back Mode

Internal LOS

Enable

RESET

Interrupt

Enable

RESET

Frame Format TimRefSel[1]

TimRefSel[0]

R/W

101

011

XRT72L13 Datasheet(PDF) 202 Page - Exar Corporation

XRT72L13 Datasheet(HTML) 202 Page - Exar Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL