T5743P3 ATMEL [ATMEL Corporation], T5743P3 Datasheet - Page 17

• Manufacturer Part Number: T5743P3
• Description: UHF ASK/FSK Receiver
• Manufacturer: ATMEL [ATMEL Corporation]

Switching the Receiver Back
to Sleep Mode
Figure 19. Timing Diagram of the OFF-command via Pin DATA
Figure 20. Timing Diagram of the OFF-command via Pin POLLING/_ON
4569A–RKE–12/02
(microcontroller)
Data_out (DATA)
Data_out (DATA)
Data_out (DATA)
Serial bi-directional
data line
Out1
Out1
Data_out (DATA)
Serial bi-directional
Serial bi-directional
Serial bi-directional
data line
data line
data line
IC_ACTIVE
IC_ACTIVE
IC_ACTIVE
Out1 (mC)
(microcontroller
IC_ACTIVE
Out1
(microcontroller)
IC_ACTIVE
POLLING/_ON
Data_out (DATA)
Serial bi-directional
data line
X
X
X
X
X
X
X
X
Receiving
mode
Receiving
Receiving
mode
mode
Receiving
mode
t1
t1
t1
t1
Receiving mode
The receiver can be set back to polling mode via Pin DATA or via Pin POLLING/_ON.
When using Pin DATA, this pin must be pulled to Low for the period t1 by the connected
microcontroller. Figure 19 illustrates the timing of the OFF command (see also Figure
34). The minimum value of t1 depends on BR_Range. The maximum value for t1 is not
limited but it is recommended not to exceed the specified value to prevent erasing the
reset marker. Note also that an internal reset for the OPMODE and the LIMIT register
will be generated if t1 exceeds the specified values. This item is explained in more detail
in the section “Configuration of the Receiver”. Setting the receiver to sleep mode via
DATA is achieved by programming bit 1 to be “1” during the register configuration. Only
one sync pulse (t3) is issued.
The duration of the OFF command is determined by the sum of t1, t2 and t10. After the
OFF command the sleep time T
is limited (see section “Data Interface”).
OFF-command
OFF-command
OFF-command
OFF-command
X
X
t2
t2
t2
t2
t
on2
t3
t3
t3
t3
(Start bit)
(Start bit)
(Start bit)
(Start bit)
t4
t4
Bit 1
("1")
Bit 1
("1")
t4
Bit 1
("1")
t4
Bit 1
("1")
Sleep mode
t10
t5
t10
t7
t5
t7
t10
t
t5
t10
t7
t5
t7
on3
Start-up mode
Sleep
elapses. Note that the capacitive load at Pin DATA
Sleep mode
Sleep mode
Sleep mode
Sleep mode
T
Bit-check mode
T
T
T
Sleep
Sleep
Sleep
Sleep
Bit check ok
X
X
Receiving mode
Start-up mode
Start-up mode
Start-up mode
Start-up mode
T
T
T
Start-up
T
Start-up
Start-up
Start-up
T5743
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