STV8287D View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
STV8287D
STMicroelectronics
'STV8287D' PDF : 149 Pages View PDF
STV82x7
8 Power Supply Management
Power Supply Management
A mixed supply voltage environment requires the following voltages:
● 3.3V capable inputs/outputs for digital pins;
● 1.8V digital core;
● 8V capable inputs/outputs for analog audio interfaces (capability to output 2 VRMS for SCART
requirements);
● 3.3V for stereo ADC and DAC (analog part);
● 1.8V for stereo ADC and DAC (digital part);
● 1.8V for IF ADC and AGC.
These voltages will be delivered by the application with an accuracy of ±5%. For more information,
refer to Section 13.3: Power Supply Data.
Other specific DC voltages or features are provided:
● Voltage Reference and Biasing Generation (AGC, ADCs, DACs),
● Bandgap reference.
8.1 Standby Mode (Loop-through mode)
The STV82x7 provides a Loop-through mode configuration that bypasses IC functions via a SCART
I/O pin (Full Analog Path only). In this case, only a minimum power of 200 mW is required.
In Standby mode, the digital and analog power supplies are switched off, except for pins VCC_H,
VCC33_LS, VCC33_SC, and VCC_NISO which are used to maintain the SCART path with the last
configuration programmed by analog matrixing (register SCART1_2_OUTPUT_CTRL and
SCART3_OUTPUT_CTRL). When switching back to normal Full Power mode, all I²C registers are
reset except for those used in Standby mode to maintain the original configuration.
In Standby mode, the I²C bus does not operate. However, the bus can still be used by other ICs
since the I²C I/O pins (SDA and SCL) of the STV82x7 are forced into a high-impedance
configuration.
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