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參數資料
型號: W88113C
廠商: WINBOND ELECTRONICS CORP
英文描述: ATAPI CD-ROM DECODER & CONTROLLER
中文描述: ATAPI的CD - ROM解碼器
文件頁數: 36/102頁
文件大小: 573K
代理商: W88113C
W88113C
Publication Release Date: Mar. 1999
- 32 - Revision 0.61
CCTL1 - Clock Control Register 1 - (write 1Ah)
This register is 0 after chip reset.
Bit 7: CLKOEN
Setting this bit high enable
pin CLKO (13)
as clock output if
APOUT (90h.1-0)
is zero.
CLKOEN (1Ah.7)
APOUT1-0 (90h.1-0)
Function of pin 13
Remark
0
0
tri-state with internal pull-up
default
1
0
clock output
x
not 0
audio LRCK output
Bit 6: TSYNC - Test Synchronization Control
When this bit is high, the detected/inserted sync can be monitored from
pin CLKO (13).
Bit 5:
XININV
- Inverted XIN as System Clock
When this bit is high, the internal system clock is inverted from crystal input pin
XIN (15).
Bit 4:
PSKEN
- Programmable System Clock Enable
When this bit is high, the frequency of internal system clock is controlled by register
PSKCTL
(59h).
Bit 3,2: CLK[1:0] - Pin CLKO Select
CLK1-0
Frequency of CLKO
Remark
0
SF
÷
2
SF
÷
4
SF
÷
1
reserved
default
1
2
3
SF
is the system frequency. Notice that the relation between system frequency and crystal
frequency depends on the setting of
XTALD2 (1Ah.w0)
and
PSKEN (1Ah.w4).
Bit 1: Reserved
Bit 0:
XTALD2 - Crystal Divided by 2
The internal clock frequency is half of crystal frequency if this bit is high.
VER - Version Register - (read 1Ah)
This register is used to hold the version number.
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