stv8226t STMicroelectronics, stv8226t Datasheet - Page 29

• Manufacturer Part Number: stv8226t
• Description: Multistandard Tv Audio Processor And Digital Sound Demodulator
• Manufacturer: STMicroelectronics

STV82x6
7
7.1
Power Supplies
Supply Voltages
The STV82x6 supports different power configurations due to its integrated voltage regulators.
Typically, two power supplies, which are grouped into two sets of IC pins, are required.
1. Digital Power Supply (DPS) This supply may be either 3.3 V or 5 V if an external power
2. Analog Power Supply (APS) This supply may be either 8 V or 5 V. In both cases, external
transistor is used. The DPS supplies pins VDD1, VDD2 and VDDP.
— In 3.3 V mode, the power is directly supplied to the digital power pins. In this case, the REG
— 5 V mode requires the use of an external transistor coupled to the integrated voltage
resistors are required, except for pin VDDH. The APS supplies pins VDDIF, VDDC, VDDA and
VDDH.
— The 8 V power supply is directly connected to pin VDDH and offers a 2 V
— If only a 5 V power supply is available for pin VDDH, the SCART outputs will be reduced to
pin is not used and must be connected to the ground.
regulator via the REG pin in order to generate a stable 3.3 V supply to the digital power pins.
voltage on SCART outputs. The other analog power pins can be supplied with an 8 V or 5 V
supply through external resistors.
1 V
3.3 V
DPS
RMS
. In this case, the SEL5V bit must be set in register ANA_CTRL.
VDD1
VDD2
VDDP
REG
Figure 17: 3.3 V / 8 V or 3.3 V / 5 V Application
Clock Generator
Digital Core
Regulator
Digital
3.3 V
Regulator
Analog
Analog
3.3 V
Core
Standby
STV82x6
VDDH
8 or 5 V
APS
Power Supplies
RMS
dynamic
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