t5743n ATMEL Corporation, t5743n Datasheet - Page 23

• Manufacturer Part Number: t5743n
• Description: Ask/fsk Receiver
• Manufacturer: ATMEL Corporation

The programming start pulse t1 initiates the program-
ming of the configuration registers. If bit 1 is set to ’1’, it
represents the OFF–command to set the receiver back to
polling mode at the same time. For the length of the pro-
gramming start pulse t1, the following convention should
be considered:
D t1(min) < t1 < 5632 T
Programming respectively OFF-command is initiated if
the receiver is not in reset mode.If the receiver is in reset
mode, programming respectively Off-command is not in-
itiated and the reset marker RM is still present at Pin
DATA.
This period is generally used to switch the receiver to pol-
ling mode or to start the programming of a register. In
reset condition, RM is not cancelled by accident.
D t1 > 7936 T
Table 13. Applicable R
Rev. A1, 25-May-00
specified value for the relevant BR_Range
C
C
L
L
≤ 100pF
≤ 1nF
Clk
pup
Clk
: t1(min) is the minimum
Preliminary Information
BR_range
B0
B1
B2
B3
B0
B1
B2
B3
Programming respectively OFF–command is initiated in
any case. The registers OPMODE and LIMIT are set to
the default values. RM is cancelled if present.
This period is used if the connected µC detected RM.If the
receiver operates in default mode, this time period for t1
can generally be used.
Note that the capacitive load at Pin DATA is limited.
Data Interface
The data interface (see figure 34) is designed for automo-
tive requirements. It can be connected via the pull–up
resistor R
The applicable pull–up resistor R
capacity C
table 13). More detailed information about the calcula-
tion of the maximum load capacity at Pin DATA is given
in the ’Application Hints U3743BM’.
pup
L
at Pin DATA and the selected BR_range (see
up to 20V and is short–circuit–protected.
1.6 kΩ to 470 kΩ
1.6 kΩ to 220 kΩ
1.6 kΩ to 120 kΩ
1.6 kΩ to 5.6 kΩ
Applicable R
1.6 kΩ to 47 kΩ
1.6 kΩ to 22 kΩ
1.6 kΩ to 12 kΩ
1.6 kΩ to 56 kΩ
pup
T5743N
pup
depends on the load
23 (34)