BT8376EPF datasheet(163/323 Pages) CONEXANT

Part #	BT8376EPF

Description	single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces

PDF	323 Pages

Scroll/Zoom	100%

Manufacturer	CONEXANT [Synaptics Incorporated.]

Direct Link	https://www.synaptics.com/

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163 / 323 page

Bt8370/8375/8376

Fully Integrated T1/E1 Framer and Line Interface

3.7 Receive LIU Registers

N8370DSE

Conexant

3-45

029—Variable Gain Amplifier Status

VGA[5:0]

Indicates the current VGA gain level. The processor must write to this register (any value)

before reading it to allow internal latches to update. The internal VGA has 64 gain values with

code value 0x3F (63 dec) equal to maximum gain. The processor can estimate the line

attenuation (or received signal level) in dB relative to a 3 V peak pulse level, according to the

following table:

or:

0.77 dB/step—under 10 dB

1.25 dB/step—10–40 dB

1.67 dB/step—40–50 dB

2.80 dB/step—50 dB

Figure 3-1. Receive Equalizer Eye Pattern Output

± Error

Tolerance

± Error

Tolerance

± Full Scale

Positive

Pulse Height

Negative

Pulse Height

ADDRESS 028 - EQ OUTPUT LEVEL (EQ_OUT)

——

VGA[5]

VGA[4]

VGA[3]

VGA[2]

VGA[1]

VGA[0]

Line Attenuation

64dB

VGA Gain

0x0F

0x1C

0x23

0x2B

0x34

0x3A

0x3D

0x3F (max)

BT8376EPF Datasheet(PDF) 163 Page - Synaptics Incorporated.

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