AS5501 / AS5502 Multimode Powerline Modem
Data Sheet
CKTX: The transmit clock is dependent on the Baud-Rate setting BD1,2.
BD1 BD2
division factor fom CKSYS
Baud-Rate (CKTX)
0
1
0
1
0
0
1
1
9216
dec
4608
dec
4608
dec
2304
dec
600Hz
1200Hz
1200Hz
2400Hz
IF-SCCLK: The intermediate frequency SC-filter is settable to two different modes, one for
dF=600Hz and the other for dF=1200Hz (dF=Fspace-Fmark). These modes are defined by the
SC-clock frequency which is generated in the timing block.
BD1 BD2 IFcenter IFbandw division factor fom CKSYS IF-SC-CLK
0
1
X
X
2700Hz
5400Hz
1200Hz
2400Hz
96
dec
48
dec
57.6kHz
115.2kHz
1.2 TRANSMITTER
BD1 SUM
FSYNTH
SCCLK
PLL
AFCF
SC-CLK
Switched Cap Filter Clock Generator
TXD
MRK-REG 9
M/S-UDC
BD1
CKTX
TxEn
0..511
(+0..4,
+0..8)
CKSYS
FREG-GEN
TX-FSK / MIXER-Fref Generator
Fmixer
SUM
BD1,2
(+20,
+40)
FSYNTH
DIVn
DIV16
FG
TXI
AAF
DAC
TxFb
BPFa BPFb BPFc
SMF
OutStage
TxOut1
TxOut2
SC-CLK
TxEnI
AGND
M1M
BPF & OutStage
BIAS
P1M
Rev A, May 2000
Page 8/25
AMSCO [ AUSTRIAMICROSYSTEMS AG ]
