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Radiometrix Ltd
Control44
page 2
Encoder Mode
Control44 can be put into Encoder Mode by connecting Mode (pin 2) to supply.
NC
Mode(Vdd)
TXE
RST
VSS
A0
A1
A2
A3
TXD
SEND
OSC1
OSC2
Vdd (+5V)
DB3
DB2
DB1
DB0
1
2
3
4
5
6
7
8
910
11
12
13
14
15
16
17
18
Pin
Name
Input/Output
Description
1
NC
2
Mode
Input
RX=0V, TX=Vdd (no pull-up, only read at reset/power up)
3
TXE
Output
Active Low RF Transmitter Enable (Open drain, require 10k pull-up)4,6
4
RST
Input
Active Low Reset (Connect to user system reset or tie to Vdd)
5
VSS
Supply
Supply Ground
6-9
A3:A0
Input
Least significant 4 bits of Address (Internal pull-ups to Vdd)1,5
10-13
DB3:DB0
Input
Least significant 4 bits of Data B (Internal pull-ups to Vdd)5
14
Vdd
Supply
4.5-5.5V supply (decouple with 0.1
µF close to IC)
15
OSC2
Output
3.58MHz resonator2
16
OSC1
Input
3.58MHz resonator2
17
SEND
Input
Active Low Send Packet (Encoder Enable)3
18
TXD
Output
Encoded Address and Data to TXD input of RF Transmitter
Decoder Mode
Control44 can be put into Decoder Mode by connecting Mode (pin 2) to Ground.
Figure 3: Control44 in Decoder Mode
STB
Mode
NC
RST
VSS
A0
A1
A2
A3
RXD
Latch
OSC1
OSC2
Vdd
DB3
DB2
DB1
DB0
RF
Vcc
GND
RXD
100nF
5V
supply
470R
470R
470R
470R
3.58MHz
NC
Mode
TXE
RST
VSS
A0
A1
A2
A3
TXD
SEND
OSC1
OSC2
Vdd
DB3
DB2
DB1
DB0
RF
Vcc
GND
TXD
4k7
5V
supply
3.58MHz
Figure 2: Control44 in Encoder Mode
STB
Mode
NC
RST
VSS
A0
A1
A2
A3
RXD
Latch
OSC1
OSC2
Vdd
DB3
DB2
DB1
DB0
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