S5N8943B Datasheet, PDF (14/22 Pages) Samsung semiconductor – G.Lite ADSL Analog Front End IC

S5N8943B
G.Lite ADSL Analog Front End IC
4.1.1.3 Recieve AGC
The main functions of the RX path are controlled by the RX_AGC register, as described below:
DATA
NAME
RESET
VALUE
RX_AGC Register (A4A3A2A1A0=XX010)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
RA
12
RA
11
RA
10
RA9
RA8
RA7
RA6
RA4
RA4
RA3
RA2
RA1
RA0
0000010010000
RA[11:0]: Receive path input gain setting 0 to 42dB gain in 0.4 dB steps. (default is 0 dB).
RA[12] is “ 1” ,the external attenuation gain(ex, –14dB) path pin#55 RX_INNG #56 RX_INPG will be
enable. RA[12] should only be utilized the short line conditions.
RA RA RA RA RA RA RA RA RA RA RA RA RA
[12] [11] [10] [9] [8] [7] [6] [5] [4] [3] [2] [1] [0]
HEX
GAIN(dB)
100001001
0000 ~ 1111
1090~109F -14.0~-8.0
100010001
0000 ~ 1111
1110~111F -8.0~-2.0
100100001
0000 ~ 1111
1210~121F -2.0~4.0
0000010010000
0090
0
0000010010001
0091
0.4
0000010010010
0092
0.8
0000010010011
0093
1.2
0000010010100
0094
1.6
0000010010101
0095
2.0
0000010010110
0096
2.4
0000010010111
0097
2.8
0000010011000
0098
3.2
0000010011001
0099
3.6
0000010011010
009A
4.0
0000010011011
009B
4.4
0000010011100
009C
4.8
0000010011101
009D
5.2
0000010011110
009E
5.6
0000010011111
009F
6.0
000010001
0000 ~ 1111
0110~011F 6.0~12.0
000100001
0000 ~ 1111
0210~021F 12.0~18.0
001000001
0000 ~ 1111
0410~041F 18.0~24.0
010000001
0000 ~ 1111
0810~081F 24.0~30.0
010000010
0000 ~ 1111
0820~082F 30.0~36.0
010000100
0000 ~ 1111
0840~084F 36.0~42.0
CONFIDENTIAL
Preliminary Information (Rev.1.0)
14