ATA5423 ATMEL Corporation, ATA5423 Datasheet - Page 53

• Manufacturer Part Number: ATA5423
• Manufacturer: ATMEL Corporation

9.1.2
9.1.3
4841A–RKE–02/05
Sleep Mode
Start–up Mode
To save current it is recommended that CLK and V
does not include the current of the Microcontroller_Interface, I
device connected to pin VSOUT (for example, microcontroller). If CLK and/or VSOUT is enabled
during RX polling mode the current consumption is calculated as follows:
During T
nal. To guarantee the reception of a transmitted command, the transmitter must start the
telegram with an adequate preburst. The required length of the preburst, T
the polling parameters T
The length of period T
factor X
calculated to be:
In US and European applications, the maximum value of T
(which is done by setting the bit X
1.2 ms in that case. The sleep time can be extended to about 300 ms by setting X
(which is done by setting X
9.6 ms.
During T
circuit starts up (T
ready to receive.
I
T
T
on the actual bit rate and the number of bits (N
S_Poll
Preburst
Sleep
=
=
Sleep
I
Sleep
Sleep
Startup_PLL
P
T
+
Sleep
I
, T
defined by the bit X
VSINT
Startup_PLL
+
1024
T
+
Startup_PLL
the PLL is enabled and starts up. If the PLL is locked, the signal processing
Startup_Sig_Proc
I
EXT
Sleep
T
DCLK
Sleep
and T
is defined by the 5–bit word sleep in control register 4, the extension
+
Sleep
, T
T
Startup_Sig_Proc
Startup_Sig_Proc
X
). After the start–up time all circuits are in stable condition and
Startup_PLL
Sleep
Sleep
in control register 4 to “1”), the time resolution is then about
Sleep
ATA5423/25/28/29 [Preliminary]
in control register 4, and the basic clock cycle T
in control register 4 to “0”). The time resolution is about
, T
, the transceiver is not sensitive to a transmitter sig-
Startup_Sig_Proc
+
T
Bit_check
Bit–check
VSOUT
) to be tested.
be disabled during RX polling mode. I
and T
Sleep
VSINT
Bit–check
is about 38 ms if X
, or the current of an external
. Thus, T
Preburst
Bit–check
Sleep
, depends on
is set to 1
DCLK
Sleep
depends
. It is
to 8
53
P