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參數(shù)資料
| 型號(hào)： | SAA7381 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | ATAPI CD-R block decoder |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP144 |
| 文件頁數(shù)： | 16/108頁 |
| 文件大?。?/td> | 380K |
| 代理商： | SAA7381 |
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1997 Aug 12
16
Philips Semiconductors
Objective specification
ATAPI CD-R block decoder
SAA7381
Table 10
The memory map of a block in the buffer RAM for standard density mode (see Table 11)
Table 11
Description of Table 10
ADDRESS (OFFSET)
TYPE OF DATA
0 to 3
4 to 2339
2340 to 2351
2352
2353
2354
2355
2356 to 2451
2452 to 2463
2464 to 2465
2466 to 2559
header field
block data field
sync field
copy of STAT0
copy of STAT1
copy of STAT2
number of C2 flags in sector (compressed format)
96-byte de-interleaved R-W data field
12-byte Q-subcode field
copy of STAT4 field; only valid if ERCO did run on this block
user work space
DATA
DESCRIPTION
Header field
The 4-byte header data consists of a 3-byte block address of absolute time (minutes,
seconds and frame, bytes 0 to 3). The fourth byte is for the mode of data:
Mode 0 = zero mode
Mode 1 = data storage with EDC and ECC
Mode 2 = data storage
in the CD-ROM mode the block data consists of 2048 bytes of user data and 288 bytes of
auxiliary data
User data:
Mode 0= all 2048 bytes in user data are zero
Mode 1= all 2048 bytes are available to the user
Mode 2= all 2048 bytes are available to the user
Auxiliary data:
Mode 0= all 288 bytes in Aux data are zero
Mode 1= the Aux field is in accordance with the EDC and ECC specification
Mode 2= all 288 bytes are available to the user
The 12-byte sync field is the next segment in memory. All bytes in the sync field are FFH,
except the first and last bytes which are $00.
Block data field
Sync field
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|---|---|
| SAA7382 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Error correction and host interface IC for CD-ROM ELM |
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