tda5235 Infineon Technologies Corporation, tda5235 Datasheet - Page 72
tda5235
Manufacturer Part Number
tda5235
Description
Enhanced Sensitivity Double-configuration Receiver With Digital Baseband Processing
Manufacturer
Infineon Technologies Corporation
Datasheet
1.TDA5235.pdf
(259 pages)
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Part Number:
TDA5235
Manufacturer:
INFINEON/英飞凌
Quantity:
20 000
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2.4.9.2
Power down and power on are controlled by the P_ON pin. A LOW at this pin keeps the
IC in Power Down Mode. All voltage regulators and the internal biasing are switched off.
A high transition at P_ON pin activates the appropriate voltage regulators and the
internal biasing of the chip. A power up reset is generated at the same time.
Figure 43
A second source that can trigger a reset is a brownout event. Whenever the integrated
brownout detector measures a voltage drop below the brownout threshold on the digital
Data Sheet
Threshold (typ . 2.45 V)
Threshold (typ . 2.45 V)
Voltage at PP2 Pin
Threshold (typ . 2V)
Threshold (typ . 2V)
Reset- / Brownout-
Reset- / Brownout-
Supply Voltage
Internal Reset
(NINT Signal)
at VDDD Pin
Reset- / Brownout-Threshold
Functional -
Functional -
Supply voltage falls below
Chip Reset
Reset Behavior
3V
3V
A ‚LOW’ is generated
at NINT signal
Supply voltage
falls below
Functional - Threshold
Level on
NINT signal
is undefined
72
Supply voltage
rises above
Functional - Threshold
A ‚LOW’ is
generated at
PP2 pin
(NINT signal)
t
R eset
A ‚HIGH’ is
generated at
PP2 pin
(NINT signal)
Functional Description
A ‚LOW’ is
generated at
PP2 pin
(NINT signal)
V1.0, 2010-02-19
TDA5235
µC reads
Interrupt-
Status-Register
t
t
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