參數(shù)資料
型號： TLV320AD11A
廠商： Texas Instruments, Inc.
元件分類： Codec
英文描述： 3.3 V INTEGRATED ADSL OVER POTS CODEC
中文描述： 3.3伏集成ADSL POTS和編解碼器
文件頁數(shù)： 9/28頁
文件大?。?/td> 412K
代理商： TLV320AD11A
TLV320AD11A
3.3 V INTEGRATED ADSL OVER POTS CODEC
SLWS087B – JUNE 1999 – REVISED MARCH 2000
9
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
register programming (see Figure 6 for timing and format details)
Table 2. System Control Registers (SCR)
REGISTER
ADDRESS
S3, S2, S1, S0
DEFAULT
VALUE
NAME
MODE
FUNCTION
SCR0
0000
R
00000000
W
D0: S/W RESET (self clearing)
SCR1
0001
R/W
00000000
D[4:0]=TX channel PAA gain select. D[4:0]=00000 for 0 dB
D[4:0]=11000 for –24 dB
SCR2
0010
R/W
00000000
D[5:0]=RX PGA2. D[5:0]=000000 for 0 dB. D[5:0]=101110 for 11.5 dB.
SCR3
0011
R/W
00000000
D[2:0]= RX EQ slope select. D[2:0]=000 for 0dB/MHz, D[2:0]=001 for 5 dB/MHz,
D[2:0]=101 for 25 dB/MHz
SCR4
0100
R/W
00000000
D[7:0]=VCXODAC (low 8 bits of 12-bit DAC code)
SCR5
0101
R/W
00000000
D[7:0]=VCXODAC (high 8 bits of 12-bit DAC code)
SCR6
0110
R/W
00000000
D[7:0]=GP[7:0]
SCR7
0111
R/W
00000000
MISC control (set to 1 to enable)
D0: bypass TX DHPF (25.875 kHz)
D1: S/W power-down RX channel
D2: S/W power-down TX channel
D3: analog loop-back (TX channel)
D4: digital loop-back (TX and EC channel)
D5: TX parallel interface (read-back) test mode enable
D6: EC channel power down
D7: EC analog loop-back
SCR8
1000
R/W
00000000
D[4:0]=EC channel PAA gain select. D[4:0]=00000 for 0 dB.
D[4:0]=11000 for –24 dB.
SCR9
1001
R/W
00000000
D[7:0]=RX offset low
SCR10
1010
R/W
00000000
D[7:0]=RX offset high
SCR11
1011
R/W
00000000
D[4:0]=TX digital gain select. The gain range is –1dB to 1dB in 0.1 dB-steps.
D[4:0]=00000 for 0 dB. D[4:0]=00001 for +0.1 dB. D[4:0]=01010 for +1 dB.
D[4:0]=10000 for –1 dB. D[4:0]=11001 for –0.1 dB.
SCR12
1100
R/W
00000000
D[2:0]=RX PGA1. D[2:0]=000 for 0 dB. D[2:0]=110 for 6 dB.
SCR13
1101
R/W
00000000
D[4:0]=EC digital gain select. The gain range is –1dB to 1dB in 0.1-dB steps.
D[4:0]=00000 for 0 dB. D[4:0]=00001 for +0.1 dB. D[4:0]=01010 for +1 dB.
D[4:0]=10000 for –1 dB. D[4:0]=11001 for –0.1 dB.
SCR14
1110
R/W
00000000
D0: Sync the write operation when ONE_WE is selected. After D0 is set to 1, the first
pulse of WETX goes to TX channel, and the second pulse goes to EC channel.
The bit will be self-cleared to 0.
D1: enable FIFO (first-in, first-out). See Note 1.
D2: Bypass EC DHPF (25.875 kHz)
D3: ECNULL. When D3 is set to 1, ECP and ECM are connected to weakly driven
mid supply. It can only be used during EC power-down mode.
NOTE 1: It is a two-stage FIFO buffer, and can store up to two write-samples if asynchronous write operation is required.
SCR0 – system control register
Address:0000b
Contents at reset: 00000000b
D7
D6
D5
D4
D3
D2
D1
D0
REGISTER
VALUE (HEX)
01
DESCRIPTION
0
0
0
0
0
0
0
1
S/W reset (self clearing). All control registers are set to reset content.
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