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