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參數(shù)資料
| 型號： | SAA7390GP |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | High performance Compact Disc-Recordable CD-R controller |
| 中文描述： | 高性能式光盤CD - R光盤控制器 |
| 文件頁數(shù)： | 31/76頁 |
| 文件大?。?/td> | 366K |
| 代理商： | SAA7390GP |
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1996 Jul 02
31
Philips Semiconductors
Preliminary specification
High performance Compact
Disc-Recordable (CD-R) controller
SAA7390
Table 37
Q-channel information: 0xF084, F094, F095, F0A9, F0AA, F0AB, F0B1, F0B2, F0CF and F0FA,; note 1
Note
1.
These registers contain the information taken from the raw sub-channel information from the CD decoder. Due to the
fact that this data has not had any error correction applied to it, it is necessary to perform a CRC check for validity.
Twelve bytes of Q-channel information are assembled from each sector of data; the last two bytes contain the CRC
parity. Therefore the validity of the contents of these registers can only be determined after the last bit has been
loaded and checked.
MNEMONIC
R/W
DATA BYTE
7
6
5
4
3
2
1
0
QZERO
QTNO
QINDX
QMODE
QAMIN
QASEC
QAFRM
QMIN
QSEC
QFRM
R
R
R
R
R
R
R
R
R
R
ZERO7 to ZERO0
TRACK7 to TRACK0
INDEX7 to INDEX0
MODE7 to MODE0
ABSMIN7 to ABSMIN0
ABSSEC7 to ABSSEC0
ABSFRM7 to ABSFRM0
RELMIN7 to RELMIN0
RELSEC7 to RELSEC0
RELFRM7 to RELFRM0
Table 38
Times from QCHRDY to BADQ (RDDSTAT)
For example, at the n = 4 data rate, the BADQ flag
(in RDDSTAT) should be checked 545
μ
s after the
QFRMRDY interrupt (from RDDSTAT) is asserted.
If BADQ is LOW then the contents of the Q-channel
registers are valid; otherwise the CRC check failed and the
Q-channel information may be incorrect. If the data clock
is running (ECMD LOW or ENABRED HIGH) then BADQ
will be valid until the end of the sector; otherwise BADQ is
valid until the end of the next Q frame.
SPEED
TIME (
μ
s)
2177
1089
545
363
273
n = 1
n = 2
n = 4
n = 6
n = 8
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