VS1005g Datasheet
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VS1005 GENERAL DESCRIPTION
7.1 VS1005 Internal Architecture
Vs1005 block diagram is shown in figure 8.
Figure 8: VS1005 Block Diagram
7.1.1 Regulator Section
The VHIGH pin in the regulator section is used as a common main power supply for voltage
regulation. This input is connected to three internal regulators, which are activated when the
PWRBTN pin voltage is kept above 0.9V for about one millisecond, so that AVDD starts to rise
and reaches about 1.5 V. After the PWRBTN has given this initial start current, the regulators
reach their default voltages even if the PWRBTN is released. VHIGH must be sufficiently (about
0.3 V) above the highest regulated power (normally AVDD) so that regulation can be properly
performed.
The PWRBTN state can also be read by software, so it can be used as one of the user interface
Version: 0.2, 2012-03-16
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ETC [ ETC ]
