SAF7849HL/M295,557 NXP Semiconductors, SAF7849HL/M295,557 Datasheet - Page 65

• Manufacturer Part Number: SAF7849HL/M295,557
• Description: IC AUD DECODER 144LQFP
• Manufacturer: NXP Semiconductors
• Type: Audio Decoderr

Specifications of SAF7849HL/M295,557

• Applications: Audio CD
• Voltage - Supply, Analog: 3 V ~ 3.6 V
• Voltage - Supply, Digital: 1.8V, 3.3V
• Mounting Type: Surface Mount
• Package / Case: 144-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 935287932557

NXP Semiconductors
SAF784X_2
Product data sheet
6.9.3 Segmentation buffer ARM sub-system interface
Once the interrupt has been triggered, it will remain asserted until cleared by the
Inreq_Clr signal. However, after being cleared, it is then free to fire again on the next
transition.
Note that the register bit INREQ_CLR retains the latest value written by the ARM
processor so a typical sequence will be to write logic 0 followed some time later by logic 1
in order to return to the non-reset state.
The segmentation buffer access to the ARM sub-system is fully synchronous. The
implementation allows for minimum latency-overhead so as to maximize the available
bandwidth on the ARM processor. The synchronous interface is AMBA AHB-compliant.
Note: The synchronous transfers are initiated by the Direct Memory Access (DMA)
controller. Once sector transfer has been initiated, the recommendation is that these
transfers should not be interrupted and the application must allow for the complete sector
to be copied to the main ARM sub-system 110 kB internal memory.
Fig 36. SAF784x data path with segmentation manager
CD SLIM
ARM7TDMI-S
(MASTER)
16
C2I
DECODER
BLOCK
One chip CD audio device with integrated MP3/WMA decoder
Rev. 02 — 9 May 2008
MASTER
DMA
multi-layer
MiMeD2
15
AHB bus
SYNCHRONOUS
INTERFACE
AHB
ARBITRATION
INTERRUPT
HANDLING
32
32
ROM
AHB
ACU
32
SEGMENTATION
SEGMENTATION
MANAGER
MEMORY
RAM
AHB
SAF784x
© NXP B.V. 2008. All rights reserved.
HANDLER
DEM DAC
001aag347
SRC
I
2
S
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