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SAA7385 Datasheet(PDF) 23 Page - NXP Semiconductors

Part No. SAA7385
Description  Error correction and host interface IC for CD-ROM SEQUOIA
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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SAA7385 Datasheet(HTML) 23 Page - NXP Semiconductors

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1996 Jun 19
23
Philips Semiconductors
Preliminary specification
Error correction and host interface IC for
CD-ROM (SEQUOIA)
SAA7385
Table 15 SAA7385 address map details for the 80C32
ADDRESS
FUNCTION
0000 to 7FFF
This 32 kbyte window is used to address and portion the DRAM buffer. It is intended for non-frame
mapped memory to be addressed through this window. The upper page address bits (to address the
full range of the DRAM buffer) are set by the linear address page register (PAGEREG).
8000 to 8FFF
All accesses to frame memory use this window to read or write to the buffer memory. The actual
address to the DRAM buffer is Micro Frame Number (MICFRM#) times 3 k plus the 12 LSBs from the
80C32.
9000 to 9FFF
This frame window is identical to the frame 0 window with the exception that one is added to the
value from the Micro Frame Number (MICFRM#).
A000-AFFF
This frame window is identical to the frame 0 window with the exception that two is added to the
value from the Micro Frame Number (MICFRM#).
B000-EFFF
Not used; outputs are driven LOW
F000-FFFF
SAA7385 control registers
Fig.12 Address map for the microcontroller.
handbook, halfpage
MGE398
0000
7FFF
8000
9000
A000
AFFF
FFFF
F000
80C32
SCRATCH PAD RAM
DATA SECTOR WINDOW
(FRAME 0)
DATA SECTOR WINDOW
(FRAME 1)
DATA SECTOR WINDOW
(FRAME 2)
SAA7385
CONTROL REGISTERS


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