TDA5255XT Infineon Technologies, TDA5255XT Datasheet - Page 30
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TDA5255XT
Manufacturer Part Number
TDA5255XT
Description
Manufacturer
Infineon Technologies
Datasheet
1.TDA5255XT.pdf
(91 pages)
Specifications of TDA5255XT
Operating Temperature (min)
-40C
Operating Temperature (max)
85C
Operating Temperature Classification
Industrial
Product Depth (mm)
4.4mm
Product Length (mm)
9.7mm
Operating Supply Voltage (min)
2.1V
Operating Supply Voltage (max)
5.5V
Lead Free Status / Rohs Status
Compliant
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2.4.16
Figure 2-9
Table 2-28
SLAVE MODE: The receive and transmit operation is fully controlled by an external control device
via the respective RxTx, AskFsk, PwdDD, and Data pins. The wakeup logic is inactive in this case.
After RESET or 1
CONFIG register the mode may be changed.
SELF POLLING MODE: The chip turns itself on periodically to receive using a built-in 32kHz RC
oscillator. The timing of this is determined by the ON_TIME and OFF_TIME registers, the duty cycle
can be set between 0 and 100% in 31.25µs increments. The data detect logic is enabled and a 15µs
LOW impulse is provided at PwdDD pin (Pin 27), if the received data is valid.
Figure 2-10
Note: The time delay between start of ON time and the 15µs LOW impulse is 2.6ms + 3 period of
data rate.
Data Sheet
MODE_1
SELF POLLING MODE
0
0
1
Wakeup Logic
MODE settings: CONFIG register
PwdDD pin in
Wakeup Logic States
Timing for Self Polling Mode (ADC & Data Detect in one shot mode)
st
Power-up the chip is in SLAVE MODE. By setting MODE_1 and MODE_2 in the
Action
SELF POLLING
MODE_1 = 1
MODE_2 = X
MODE_2
MODE
X
0
1
min. 2.6ms
RX ON: valid Data
ON_TIME
SLAVE MODE
MODE_1 = 0
MODE_2 = 0
(default)
15µs
30
OFF_TIME
TIMER MODE
SELF POLLING MODE
MODE_1 = 0
MODE_2 = 1
SLAVE MODE
TIMER MODE
Mode
RX ON: invalid Data
ON_TIME
Functional Description
TDA5255 E1
Version 1.2
timing_selfpllmode.wmf
2007-02-26
t
3_modes.wmf
t
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