ATA3742_07 ATMEL [ATMEL Corporation], ATA3742_07 Datasheet - Page 19

• Manufacturer Part Number: ATA3742_07
• Description: UHF ASK/FSK Receiver
• Manufacturer: ATMEL [ATMEL Corporation]

5.3.2
Figure 5-11. Timing Diagram of the OFF Command via Pin DATA
4900B–RKE–11/07
Serial bi-directional
Switching the Receiver Back to Sleep Mode
(microcontroller)
DATA (ATA3742)
data line
Out1
Receiving
The receiver can be set back to polling mode via pin DATA or via pin ENABLE.
When using pin DATA, this pin must be pulled to Low for the period t
controller.
24). The minimum value of t
but it is recommended not to exceed the specified value to prevent erasing the reset marker.
This item is explained in more detail in Section
ting the receiver to sleep mode via DATA is achieved by programming bit 1 of the OPMODE
register to be “1”. Only one sync pulse (t
The duration of the OFF command is determined by the sum of t
mand, the sleep time T
resulting time constant
to ensure proper operation.
If the receiver is set to polling mode via pin ENABLE, an “L” pulse (T
pin.
pulse, the sleep time T
held to “L”. If the receiver is polled exclusively by a microcontroller, T
“0” to enable an instantaneous response time. This command is a faster option than via pin
DATA, at the cost of an additional connection to the microcontroller.
mode
X
X
Figure 5-12 on page 20
Figure 5-11
t
1
OFF command
t
2
illustrates the timing of the OFF command (see also
Sleep
Sleep
t
(Start Bit)
3
together with an optional external pull-up resistor may not be exceeded
Bit 1
("1")
t
4
elapses. The receiver remains in sleep mode as long as ENABLE is
illustrates the timing of that command. After the positive edge of this
elapses. Note that the capacitive load at pin DATA is limited. The
1
t10
t
t7
5
depends on BR_Range. The maximum value for t
3
) is issued.
“Configuration of the Receiver” on page
T
Sleep
1
, t
2
and t
Sleep
Doze
1
by the connected micro-
) must be issued at that
can be programmed to
10
. After the OFF com-
Figure 5-15 on page
Startup mode
ATA3742
1
is not limited
20. Set-
19