參數(shù)資料
型號(hào)： 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)： 59/76頁
文件大小： 366K
代理商： SAA7390GP
1996 Jul 02
59
Philips Semiconductors
Preliminary specification
High performance Compact
Disc-Recordable (CD-R) controller
SAA7390
15.6.1
R
ELATIONSHIP BETWEEN COMMUNICATION AND SYSTEM SYNCHRONIZATION
The system synchronization line (SYS_SYNC) is locked on a hardware generated frame synchronization; the decoders
sub-code, the ATIP and the encoders synchronization signals. The communication synchronization line (COM_SYNC)
has the same frequency as SYS_SYNC, except for four-times speed operation, where it is down-scaled with a factor 3.
Table 80 provides a representation between the speed and synchronization lines.
Table 79
Relationship of synchronization line frequency and speed.
SIGNAL
SPEED (ms)
n = 1
n = 2
n = 4
n = 6
SYS_SYNC (full period)
SYS_SYNC (half period)
COM_SYNC (half period)
13.3
6.6
6.6
6.6
3.3
3.3
3.3
1.66
5.0
2.2
1.1
3.3
Fig.24 Phase relationship of COM_SYNC and SYS_SYNC (n = 1, n = 2).
handbook, full pagewidth
MGE526
decoder interrupt
ATIP sync interrupt
encoder interrupt
COM_SYNC
SYS_SYNC
Fig.25 Phase relationship of COM_SYNC and SYS_SYNC (n = 4).
handbook, full pagewidth
MGE527
COM_SYNC
SYS_SYNC
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