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參數資料
型號: W88227F
廠商: WINBOND ELECTRONICS CORP
元件分類: 消費家電
英文描述: ATAPI CD-ROM Decoder(支持ATAPI標準的CD-ROM解碼器)
中文描述: SPECIALTY CONSUMER CIRCUIT, PQFP128
封裝: PLASTIC, QFP-128
文件頁數: 67/116頁
文件大?。?/td> 787K
代理商: W88227F
Preliminary/Confidential
Subject to change without notice
W88227F/W88227QD
- 63 -
1999/10/1 Rev: 0.70
MEMCF - Memory Layout Configuration Register - (write 2Bh)
Bits 7-6: Reserved
Bits 5-4: DBAF[1:0] – Obsolete
These two bits must be set 0.
Bit 3:
DFRST - Data FIFO Reset
Setting this bit high resets Data FIFO. This bit is not self-clear.
Bit 2:
FRDY - Fast Pin IORDY Enable
Setting this bit high accelerates the de-assertion of
pin IORDY
without referring
pin nHRD
.
Bit 1-0: RLC[1:0] - External RAM Layout Configuration Bits
The memory layout configuration should be set as shown in the following table:
RLC[1:0]
Block Size
0,1
--
2
C00h
3
A00h
The block size should be set as C00h if
C2WEN (10h.w2)
is enabled.
SICTL1 - Subcode Interface Control Register 1 - (write 2Ch)
Bit 7:
SBXCK - Subcode External Clock
The external clock from
pin EXCK
is used by the subcode logic if this bit is high.
SCEN - Subcode Enable
Bit 6:
Setting this bit high enables the subcode logic.
Bit 5:
CD2SC - Clock Divided By 2 For Subcode Logic
The subcode clock is divided by two if this bit is high.
Bit 4:
SCIEN - Subcode Interrupt Enable
Setting this bit high enables subcode interrupts.
Bit 3:
EXINV - External Clock Invert Select
If
EXOP (2Ch.w2)
is high, setting this bit high selects an inverted clock output at
pin EXCK
.
EXOP - Pin EXCK Operation
Bit 2:
Setting this bit high sets
pin EXCK
as an output.
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