AMIS-52150 Datasheet, PDF (14/25 Pages) AMI SEMICONDUCTOR – Low-Power Transceiver with Clock and Data Recovery

AMIS-52150
Low-Power Transceiver with Clock and Data Recovery
Table 22: Transmitter Control Registers
TX/RX Definition Control Registers
Register (HEX) Name
0x02
TX power
0x04
TX XTAL trim
0x0c
TX enable
0x0f
Data filter
0x1e
TX/RX invert
Bits
All
All
4
4,5,6
5
States
0
1
000
001
010
011
100
101
110
111
0
1
Comments
Transmitter is off
Transmitter is on
1.1kHz
2.3kHz
5.2kHz
10.4kHz
1.18kHz
2.57kHz
7.0kHz
20.45kHz
Normal levels
Inverted
Table 23: Output Impedance Characteristics
Specification
Settings
Output impedance
Output power
Harmonics
Frequency range
RFPWR 0x00
RFPWR 0xff
Modulation
On/off ratio
TX output
Conditions
Resistance
Capacitance
Ext. circuit
Target
Quick Start
Full range
Min.
11
402
350
300
Typ.
22
3
-26
12
-35
ASK/OOK
70
Max.
13
405
448
768
Units
Ω
pFarads
dBm
dBm
dBm
MHz
MHz
MHz
dBm
Data Sheet
Figure 8: Transmit Waveforms
9.3 Sniff Mode^TM
Applications based on low power consumption require Sniff Mode^TM operation of the AMIS-52150. This mode turns off the receiver and
the crystal oscillator during programmable, regular time intervals. At the end of each time interval, the receiver wakes up and sniffs for
the incoming RF energy. If energy is detected, the receiver transitions to the full receive mode and starts data recovery from the RF
carrier. If energy is not detected, the receiver returns to the low power or “sleep” state. Sniff Mode^TM operation is programmable; the
“sleep” time as well as multiple delay sequences can be fully programmed. Table 24 lists the Sniff Mode^TM control registers.
Typical timing waveforms for operation in Sniff Mode^TM are shown in Figures 9 and 10.
AMI Semiconductor – Apr. 07 – M-20535-006
14
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