Block Diagram Of Audio Subsystem - Samsung S5PC110 Manual

S5PC110_UM 1 AUDIO SUBSYSTEM

1.4 BLOCK DIAGRAM OF AUDIO SUBSYSTEM

Figure 1-1 Block Diagram of Audio Subsystem
There are two modes for turning the power on and off, namely, normal mode and deep-idle mode.
Both audio subsystem and TOP (S5PC110) work in the Normal mode. However, to save power, you can turn off
the TOP. Turning off the TOP means that the S5PC110 goes into the Deep-idle mode. In this mode, the audio
subsystem can remain on. The audio subsystem can wake up the TOP (S5PC110) from deep-idle mode, using
wake up source such as RP and I2S V51.
The audio subsystem receives four kinds of clock from CMU, namely, XXTI, EPLL, I2SCDCLK0, and
SCLK_AUDIO0. The XXTI is a selected clock between main OSC(XXTI) and USB OSC(XusbXTI) which is
selected by OM[0].
XXTI, EPLL, and I2SCDCLK0 can be supplied to the audio subsystem when the audio system is on and TOP
(S5PC110) is off.
The internal RP uses big-endian scheme, while the external audio subsystem uses little-endian scheme.
Therefore, endian converters are used to convert data ordering without using ARM or RP.
Audio subsystem comprises of I2S V5.1 and its own interrupt, and DMA REQ/ ACK ports.
The master port accesses DRAM and IRAM using bus-master modules in audio subsystem.
On the other hand, the slave port accesses all modules in audio subsystem using external audio subsystem
modules. All bus-master modules in S5PC110 can assess modules in audio subsystem (excluding RP core).
UART for RP debugging and UART pad are muxed with system UART2. For more information, refer to GPIO
User's Manual.
NOTE: For more information about power modes such as Deep-idle, refer to Power Management Unit (PMU) User's Manual.
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