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參數(shù)資料
| 型號： | SAA7390 |
| 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)： | 25/76頁 |
| 文件大?。?/td> | 366K |
| 代理商： | SAA7390 |
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1996 Jul 02
25
Philips Semiconductors
Preliminary specification
High performance Compact
Disc-Recordable (CD-R) controller
SAA7390
Table 18
RDSW field descriptions
Table 19
Jumper status register: 0xF0C9; note 1
Note
1.
The bit fields for the jumpers are explained in Table 21 (note that the meaning of the jumpers is application specific).
Table 20
RDJMPRS field descriptions
Table 21
General purpose bits: 0xF0C2; note 1
Note
1.
Register 0xF0C2 controls the direction and output state of the general purpose I/O bits on the SAA7390. Reading
the GPIO direction bits reflects the last value that was written to the register. The four GPIO data bits shows the
current value of the input signals in the input mode. In the output mode, the last value written to the output latches is
that which is read back.
FIELD
LOGIC
DESCRIPTION
TRAYSW
0
1
tray position in
tray position out
user is requesting the drive tray to open (active LOW)
user is requesting a decrease in volume (active LOW)
user is requesting an increase in volume (active LOW)
high frequency detection; laser is on and focused (active LOW)
EJECT
VOLDN
VOLUP
HFD
MNEMONIC
R/W
DATA BYTE
7
6
5
4
3
2
1
0
RDJMPRS
R
RESERVED (2 to 0)
ALO/PRE
PAREN
SCSIID2
SCSIID1
SCSIID0
FIELD
DESCRIPTION
SCSIID
SCSI identity. Installing pull-up shunts on the ID selection jumpers (DD2 to DD) sets the respective
SCSI ID bits HIGH on de-assertion of reset.
SCSI bus parity enable. Installing a pull-up shunt on DD3 sets this bit HIGH on de-assertion of reset.
The firmware should interpret this as SCSI bus parity enable.
Allow/Prevent. Installing a pull-up shunt on DD4 sets this bit HIGH on de-assertion of reset.
Drive firmware interprets this as allowing access to media.
PAREN
ALO/PRE
MNEMONIC
R/W
DATA BYTE
7
6
5
4
3
2
1
0
GPIOCTL
R/W
GPDAT4
GPDIR4
GPDAT3
GPDIR3
GPDAT2
GPDIR2
GPDAT1
GPDIR1
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