ATA5723 ATMEL Corporation, ATA5723 Datasheet - Page 30
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ATA5723
Manufacturer Part Number
ATA5723
Description
Ata5723 Uhf Ask/fsk Receiver
Manufacturer
ATMEL Corporation
Datasheet
1.ATA5723.pdf
(46 pages)
- Current page: 30 of 46
- Download datasheet (828Kb)
13. Programming the Configuration Register
Figure 13-1. Timing of the Register Programming
Figure 13-2. Data Interface
30
Serial bi-directional
(microcontroller)
Data_out (DATA)
ATA5723/ATA5724/ATA5728
data line
IC_ACTIVE
Out1
V
Data_in
Data_out
S
= 4.5V to 5.5V
0V/5V
Receiving
X
X
The configuration registers are serially programmed using the bi-directional data line as shown
in
To start programming, the serial data line DATA is pulled to low by the microcontroller for the
time period t1. When DATA has been released, the receiver becomes the master device. When
the programming delay period t2 has elapsed, the receiver emits 15 subsequent synchronization
pulses with the pulse length t3. After each of these pulses, a programming window occurs. The
delay until the program window starts is determined by t4, the duration is defined by t5. The indi-
vidual bits are set within the programming window. If the microcontroller pulls down pin DATA for
the time period t7 during t5, the corresponding bit is set to “0”. If no programming pulse t7 is
issued, this bit is set to “1”. All 15 bits are programmed this way. The time frame to program a bit
is defined by t6.
mode
Figure 13-1
Interface
Input
t1
ATA5723
ATA5724
ATA5728
0V to 20V
t2
and
Figure
I
D
t3
(Start bit)
Bit 1
("0")
t4
DATA
t6
13-2.
t5
t7
Serial bi-directional data line
(Register
V
R
C
select)
Programming frame
X
pup
L
Bit 2
("1")
= 5V to 20V
I/O
(Poll 8)
Bit 14
("0")
Microcontroller
(Stop bit)
Bit 15
Out1 (microcontroller)
("0")
t8
t9
T
Sleep
mode
Sleep
9106D–RKE–02/08
Start-up
T
mode
Start-up
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