AS5501 / AS5502 Multimode Powerline Modem
Data Sheet
Multimode Powerline-Modem
AS5501 / AS 5502
Key Features:
AS5501/02
is an FSK-modem device for
narrow-band FSK
communication via a
Power-Line. The device is operated with a single supply voltage of 5V while the attached
TX-driver stage is generating a 7Vpp (AS5501) or a 14Vpp (AS5502) FSK-signal with very
low distortion which needs a supply of the external driver stage of 12V (AS5501) and 24V
(AS5502) respectively. The high output-voltages which gets coupled to the power-line by
using a transformer with proper ratios gives the advantage to lower the output impedance of
the buffer while the buffer supply-current gets kept small.
Precise filtering gives an receiver performance with low BER-figures at <13dB of S/N white
inband-noise and <-40dB S/N with monochromatic outband-noise and a sensitivity of
1.5mV
The carrier frequency is programmable in a range from 64kHz to 140kHz to support a big
variety of communication-bands including home-automation applications.
Modulation depth and Baud-Rate are programmable to 600Hz/1200Hz and 600, 1200,
2400B/s.
There is a carrier-detect function included to support channels with protocoll.
In addition to the modem-function a reference voltage output is available as well as a
supply-supervision.
Rev A, May 2000
Page 1/25
AS5501 / AS5502 Multimode Powerline Modem
Data Sheet
Table of Contents
1. FUNCTIONAL DESCRIPTION ...........................................
1.1 SERIF, RESET, TIMING ........................................
1.1.1 Serial Interface ..............................................
1.1.2 Reset ............................................................
1.1.3 Timing ..........................................................
1.2 TRANSMITTER .......................................................
1.2.1 FREG-GEN ..................................................
1.2.2 TX-BPF .......................................................
1.2.3 Output-Stage ................................................
1.3 RECEIVER ...............................................................
1.3.1 RX-BPF .......................................................
1.3.2 CARDET .....................................................
1.3.3 MIXER ........................................................
1.3.4 IF-BPF .........................................................
1.3.5 DEMOD & DATAFIL .................................
1.3.6 Bit Error Rate ................................................
1.3.7 CKR-GEN ...................................................
1.4 TEST-MUX ..............................................................
1.5 Supply and Analog Ground .....................................
2. PACKAGE and MARKING .................................................
3. PINLIST .................................................................................
4. ABSOLUTE MAXIMUM RATINGS ...................................
5. OPERATING CONDITIONS ...............................................
6. TEST SPECIFICATION .......................................................
6.1 Test Conditions ........................................................
6.2 Power Consumption Test .........................................
6.3 Input Characteristics ................................................
6.4 Output Characteristics .............................................
6.5 Reset-Test ..............................................................
6.6 CKTX Test ............................................................
6.7 TX-Timeout Test ...................................................
6.8 PLL-Test (SCCLK) ................................................
6.9 PLL-Test (FMIXER) ..............................................
6.10 TXOUT Test .........................................................
6.11 RX AGC and Filter Test .........................................
6.12 IF-Filter Test ..........................................................
6.13 RXD-Distortion Test ..............................................
6.14 Carrier Detect Test .................................................
6.15 CKRX Test ............................................................
6.16 Serial Interface Test ................................................
3
4
4
6
7
8
9
11
11
13
14
15
15
15
15
16
16
16
17
18
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20
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22
22
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23
24
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25
Rev A, May 2000
Page 2/25
AS5501 / AS5502 Multimode Powerline Modem
Data Sheet
1. FUNCTIONAL DESCRIPTION
The AS5501/02 is a SYNCHRONOUS HALF DUPLEX FSK MODEM with programmable
FSK-frequencies, Baud-Rate and ReceiverFilter-Characteristics working with a single +5V
SUPPLY. The circuit is designed to be used with an external buffer-stage and transformer-
coupling to transfer data over a POWER-LINE.
A mask-programmed default setting defines the state after power-up (reset) see chapter 1.1.
With the serial interface the default setting can be overwritten.
A0/CS
SD-IN
SCLK
RES-TH
MCLK
SERIF
RESET
TIMING
SD-OUT
RESN
VREF
CKSYS
contr. & clock signals
TXD
TxEn
ZC
TRANSMITTER
AFCF
AGND
TxFb
TxOut1
TxOut2
M1M
P1M
RXI,AGND,CKTX,SC-CLK...
RECEIVER
RXO,IFI,IFO
CD
RXD
CLR/T
TST-IN
TEST-MUX
TST-OUT
AVSS
AVDD
DVSS
DVDD
Rev A, May 2000
Page 3/25
AS5501 / AS5502 Multimode Powerline Modem
Data Sheet
1.1 SERIF, RESET, TIMING
Default Setting Rom
A0/CS
SD-IN
SCLK
RES-TH
SERIAL INTERFACE
SD-OUT
CONTROL REGISTERS
Control Register Output
POR
BAND GAP REF.
BD1,2, ZCEN, MMV
MCLK
TXEN
ZC
RESN
VREF
CKSYS
TIMING
TXENI
CKTX
IF-SCCLK
SC-CLK
Fmixer
mux
Mclk/2
Test1,2
1.1.1 SERIAL INTERFACE
There is a serial interface implemented for setting the control bits by a CPU.
Three bytes are available with following definitions and default contents (after reset).
Reg.-Name addr
D1
D2
D3
D4
D5
D6
D7
MRK-REG
(def. value)
GLOBAL
(def. value)
TEST
00H
01H
02H
MRK1
1
MRK9
1
TEST1
MRK2
0
BD1
1
TEST2
MRK3
1
BD2
1
ASYN
MRK4
0
RxBw1
1
AgcH
MRK5
0
RxBw2
0
digMix
MRK6
0
ZCEN
1
noTSTin
MRK7
1
MMV
0
TxSyn
D8
MRK8
1
PWD
0
FCdOn
(The default setting of the register "TEST" is always 00h.)
Bit-Name
MRK1-9
BD1,2
RXBW1,2
ZCEN
MMV
PWD
TEST1,2
ASYN
AgcH
digMix
noTSTin
TxSyn
FCdOn
Rev A, May 2000
Function
defines TX Mark Frequency (63.9k-140.55kHz)
defines Baud-Rate and Modulation-Depth
defines RX-BandPassFilter Bandwidth
disable ZeroCrossing TX-Sync
disables transmit Timeout
enables power down mode
enables Test Mode 1-3
disable synchronized receive data RXD
hold AGC counter-state
enables digital mixer; analog mixer enabled by def.
TST-out function only for receiver debugging
enables TXD sampling with CLR/T rising-edge
enables faster CD-ON timing (5/Bdrate)
default val.
453
1, 1
1, 0
1
0
0
0, 0
0
0
0
0
0
0
default function
131.85kHz
2400Hz/1200Hz
4.8kHz @132.45kHz
ZC-disabled
TimeOut enabled
powered up
normal mode
sync. RXD
AGC-loop active
analog mixer
TSTin&out availab.
CLR/T gets synchronised
by TXD-edges
Tcdon=(10/Bdrate)
Page 4/25
Embedded System
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