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CS7808-CM Datasheet(PDF) 18 Page - Cirrus Logic

Part No. CS7808-CM
Description  MULTI PURPOSE AUDIO/VIDEO EMBEDDED PROCESSOR
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Maker  CIRRUS [Cirrus Logic]
Homepage  http://www.cirrus.com
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CS7808-CM Datasheet(HTML) 18 Page - Cirrus Logic

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CS7808
18
3. FUNCTIONAL DESCRIPTION
3.1
Block Diagram
The CS7808 block diagram is shown in Figure 14.
3.2
CS7808 Device Details
3.2.1
RISC-32 Processors
Two Powerful 32-bit RISC processors (RISC0 and
RISC1)
Virtual memory support
Optimizing C compiler
Big or little endian data formats support
MAC multiply/accumulate in 2 cycles with C support
4 Kbyte instruction cache, 2 Kbyte data cache
Single cycle instructions, runs at 81 Mhz
3.2.2
Powerful 32-Bit DSP
Powerful 32/24-bit DSP processor
24-bit fixed point logic, with 54-bit accumulator
Single-cycle throughput, 2-cycle latency multiply
accumulate, 34-bit simple integer logic
8-Kbyte instruction cache, 8-Kbyte program visible
local memory
Single cycle instructions, runs at 81 Mhz
3.2.3
System Controls
Includes several hardware lockable semaphore
registers
General-purpose register for inter-processor com-
munication
32-bit timers for I/O and other uses, with program-
mable interval rates
Both hardware and software interrupts on data or
debug
RISC0
(Navigation &
Control)
PLL (Main,
Audio, SDRAM)
MPEG2 Video
Decoder
2/4/8 Bit OSD
Video Processor
(I/O, Scale, PIP, Mix)
SubPicture
Decoder
RISC1
(Application)
AC '97
CODEC
Interface
PCM, SPDIF
Interface
AUDIO DSP
DMA Control
(BitBlt, CSS)
Mem Control
(SDRAM,ROM)
Host Interface
(ATAPI,AV,ISA)
External IO
(GPIO, IR)
Registers
I2C
(Debug Port)
Figure 14. CS7808 Block Diagram


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