ATA5744 ATMEL Corporation, ATA5744 Datasheet - Page 10

• Manufacturer Part Number: ATA5744
• Description: Ata5744 Uhf Ask Receiver
• Manufacturer: ATMEL Corporation

5. Pin ENABLE
Figure 5-1.
Figure 5-2.
10
ENABLE
ENABLE
Dem_out
Dem_out
DATA
DATA
ATA5744
Enable Timing (1)
Enable Timing (2)
Via the pin ENABLE the operating mode of the receiver can be selected (see
ure
If the pin ENABLE is held to Low, the receiver remains in sleep mode. All circuits for signal pro-
cessing are disabled and only the XTO is running in that case. The current consumption is
I
To activate the receiver, the pin ENABLE must be held to High. During the start-up period,
T
depends on the selected baud-rate range (BR_Range).
After the start-up period, all circuits are in a stable condition and the receiver is in the receiving
mode.
In receiving mode, the internal data signal (Dem_out) is switched to pin DATA. To avoid incor-
rect timing at the begin of the data stream, the begin is synchronized to a falling edge of the
incoming data signal. The receiver stays in the receiving mode until it is switched back to sleep
mode via pin ENABLE.
During start-up and receiving mode, the current consumption is I
S
Startup
Sleep mode
= I
Sleep mode
I
S
5-2).
I
S
Soff
= I
= I
, all signal processing circuits are enabled and settled. The duration of the start-up period
Soff
in that case. During the sleep mode the receiver is not sensitive to a transmitter signal.
Soff
Start-up mode
Start-up mode
I
S
I
T
T
S
= I
Start-up
Start-up
= I
Son
Son
Receiving mode
Receiving mode
S
I
= I
S
I
S
= I
= I
Son
Son
Son
.
t
t
ee_sig
ee_sig
Figure 5-1
4893A–RKE–11/05
and
Fig-