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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)： | 22/76頁 |
| 文件大?。?/td> | 366K |
| 代理商： | SAA7390GP |
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1996 Jul 02
22
Philips Semiconductors
Preliminary specification
High performance Compact
Disc-Recordable (CD-R) controller
SAA7390
Table 11
Microcontroller frame number address registers: 0xF0F6 and 0xF0F7; note 1
Note
1.
Registers 0xF0F6 and 0xF0F7 provide the frame number address for the microcontroller access to memory. The
counter associated with these registers is loaded after the most significant byte is written; the least significant byte
must be written first to ensure that the counter is loaded correctly. If a DRAM access is in progress that uses the
address from the counter, the update will be delayed until the access is complete.
Table 12
Microcontroller address page register: 0xF0FF; note 1
Note
1.
Register 0xF0FF is used by the buffer manager for the upper address lines when the microcontroller addresses
non-frame memory. These registers overlap frame memory, so register 0xF0FF must be programmed with an
address in the top part of the memory if no overlap is required. The microcontroller page address line is selected from
this register. The outputs are used directly to control DRAM access cycles, and will affect any current DRAM cycle
in progress.
MNEMONIC
R/W
DATA BYTE
7
6
5
4
3
2
1
0
MICFRM#
MICFRM#
R/W
R/W
FRAME7
FRAME6
FRAME5
FRAME4
FRAME3
FRAME2
FRAME10
FRAME1
FRAME9
FRAME0
FRAME8
MNEMONIC
R/W
DATA BYTE
7
6
5
4
3
2
1
0
PAGEREG
R/W
MA_21
MA_20
MA_19
MA_18
MA_17
MA_16
MA_15
It is possible to access three contiguous frames from the
microcontroller by reading the three data sector windows,
0x8000 to 0x8FFF, 0x9000 to 0x9FFF and
0xA000 to 0xAFFF. This function is required for the
decoding of the sub-code information. If the ‘next’ frame
wraps past the last frame pointer (LASTFRM) then the
pointers are modified to wrap back to the start pointer
onwards (FEFRM#); this section is transparent to the
microcontroller.
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