W88113C Datasheet, PDF (27/102 Pages) Winbond – ATAPI CD-ROM DECODER & CONTROLLER

W88113C
FRST - Firmware Reset Register - (write 0Fh)
Writing this register, regardless of what value is written, trigger a firmware reset. Flag FRST (2Fh.r1)
is set by firmware reset.
STAT3 - Status Register 3 - (read 0Fh)
Bit 7: STAVAb - Valid Status Valid
This bit is used to indicate that the header, pointer, and status registers about decoder logic
are available. This bit should not be used if BICEN (9Ah.7) is high.
Bit 5: ECF - Error Corrected Flag
This bit is used to indicate that there is at least one byte was corrected in the latest available
block.
Bit 1: C2DF - C2 Detected in Block Flag
If C2WEN (10h.w2) is high, C2DF becomes high when there is at least one C2PO flag was
detected in the previous block.
Bit 6,4,3,2,0: Reserved
CTRLW - Control-Write Register - (write 10h)
This register is 0 after chip reset, host reset, firmware reset and decoder reset.
Bit 7: reserved
Bit 6: SWEN - Synchronized Write Enable
If this bit is high, the change of BUFEN (0Ah.w2) will be synchronized to the end of next
sector sync. The buffering of C2PO flags is also controlled by this bit if C2WEN (10h.w2) and
BUFEN (0AH.w2) are both enabled. This function prevents buffering of an incomplete block.
Bit 5: SDSS - Subcode and DSP Sync Synchronization
This bit provides synchronization of CD-DA format data. If this bit is high, the writing of
incoming serial data to the external RAM will start at the first left-channel lower-byte following
the end of subcode block. Note that this bit should not be used when subcode logic is not
enabled.
Bit 4: DCKEN - DSP Clock Enable
If this bit is high, clock from DSP is used by internal decoder logic. DCKEN should be set
high before DECEN (0Ah.w7) is set high.
Bit 3,0: reserved
Bit 2: C2WEN - C2 Flag Write Enable
If this bit and BUFEN (0Ah.w2) are both high, the C2 flags of incoming serial data will be
latched into the external RAM. This operation is synchronized to the end of sync if SWEN
(10h.w6) is high.
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Publication Release Date: Mar. 1999
Revision 0.61