W88113C Datasheet, PDF (69/102 Pages) Winbond – ATAPI CD-ROM DECODER & CONTROLLER

W88113C
APWCL/H - Audio Playback Word Count Register - (read/write 94h/95h)
The number in this counter plus one is the word count to be playbacked for each memory block. The
default value of these registers is 0497h after chip reset, host reset and firmware reset. No need to
change this value for normal usage.
APVOL - Audio Playback Volume Register - (read/write 96h)
Bit 7-4: LVOL[3:0] - Left Channel Volume Control
Bit 3:0: RVOL[3:0] - Right Channel Volume Control
LVOL3-0/RVOL3-0
Binary Number
Attenuation (dB)
Fh
FFh
0 (On)
Eh
F0h
-0.56
Dh
E0h
-1.16
Ch
C0h
-2.50
Bh
80h
-6.00
Ah
40h
-12.0
9h
20h
-18.0
8h
10h
-24.0
7h
0Fh
-24.6
6h
0Eh
-25.2
5h
0Ch
-26.6
4h
08h
-30.0
3h
04h
-36.0
2h
02h
-42.1
1h
01h
-48.0
0h
00h
Mute (Off)
APACK - Audio Playback Interrupt Acknowledge - (write 97h)
Writing any value to this register deactivates flag APIb (01h.r2) and its corresponding interrupt.
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Publication Release Date: Mar. 1999
Revision 0.61