T8533 datasheet(42/48 Pages) AGERE

42 / 48 page

Preliminary Data Sheet

July 2001

Signal Processor

T8533/34 Quad Programmable Line Card

Agere Systems Inc.

Software Interface (continued)

Table 18. Control Bit Definitions (continued)

Control Name

(Address, Decimal)

[Address, Hex]

Bit

Assignments

Function

CTZCTRL

(140—143)

[0x8c

—0x8f]

0—30

Coefficients for the CTZ termination bleed. Defaults to 0x07ed0000.

LMSCTRL

(144)

[0x90]

3—7

Load as 0s.

0—2

Leak coefficient for LMS adaptation algorithm. Defaults to 1.

RECCTRL

(145)

[0x91]

5—7

Load as 0s.

Noise match enable (comfort noise). Defaults to 0 (disabled).

Enable residual echo control. Defaults to 0 (disabled).

0—2

Residual echo control sensitivity factor.

Defaults to 0.

Bit Number

Function

(dB)

(Threshold =)

0.0

−3.5

−6.0

−9.5

−12.0

−15.5

−18.0

−21.6

SDCTRL

(146)

[0x92]

Load as 0.

Enable analog loopback. Defaults to 0 (no loopback).

3—5

RTZ gain. Defaults to 3 (equal level point value of 3 * 0.075 = 0.225).

0—2

Transmit analog gain (XAG). Defaults to 1

(6 dB) gain.

Bit Number

Function

(dB)

0.0

6.02

12.04

18.06

24.08

SDTSI

(147)

[0x93]

Load as 0.

Digital loopback, loopback from receive to transmit at the sigma-delta

converters (digital loopback 2). Defaults to 0 (no loopback).

4—5

Digital channel feeding this analog receive channel. Defaults to channel

number.

Send idle channel code (alternating bits) to this analog receive path.

Defaults to 0 (do not send idle channel code).

Loopback from transmit to receive at the sigma-delta converters (digital

loopback 3). Defaults to 0 (no loopback).

0—1

Analog channel feeding this digital channel in the transmit direction.

Defaults to channel number.

GTX2

(148—149)

[0x94

—0x95]

0—11

Gain control for gain transfer stage in transmit direction. Defaults to

0x0400 (0 dB). This is a 12-bit multiply operation with a maximum gain of

4 (12 dB).

T8533 Datasheet(PDF) 42 Page - Agere Systems

T8533 Datasheet(HTML) 42 Page - Agere Systems

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

Datasheet Download

Link URL