SAA7385 Datasheet, PDF (25/64 Pages) NXP Semiconductors – Error correction and host interface IC for CD-ROM SEQUOIA

Philips Semiconductors
Error correction and host interface IC for
CD-ROM (SEQUOIA)
Preliminary specification
SAA7385
Table 20 General logic control register: 0xF0B9; note 1
MNEMONIC R/W
7
WTGCTL W
−
DATA BYTE
6
5
4
3
2
1
0
− PWMSEL LED LA_MUTE RA_MUTE CHANNEL1 CHANNEL0
Note
1. Register 0xF0B9 controls the audio mixing and the LED.
Table 21 WTGCTL field description
FIELD
CHANNELS
RA_MUTE
LA_MUTE
LED
PWMSEL
LOGIC
00
01
10
11
−
−
−
−
DESCRIPTION
mute
right data sent to both channels
left data sent to both channels
stereo
right channel digital mute
left channel digital mute
active LOW control for the light emitting diode
PWM is disconnected
Table 22 Drive switches register: 0xF0BA; note 1
DATA BYTE
MNEMONIC R/W
7
6
5
4
3
2
RDSW
R
−
−
−
PLAY SKIPFWD SKIPBACK
Note
1. Register 0xF0BA is used for sensing the drive switches.
1
EJECT
0
TRAYSW
Table 23 RDSW field description
FIELD
TRAYSW
EJECT
SKIPBACK
SKIPFWD
PLAY
LOGIC
0
1
−
−
−
−
DESCRIPTION
tray position in
tray position out
user is requesting the drive tray to open (active LOW)
user is requesting a track skip backwards (active LOW)
user is requesting a track skip forwards (active LOW)
user is requesting the drive to play (active LOW)
Table 24 Jumper status register: 0xF0C9; note 1
DATA BYTE
MNEMONIC R/W
7
6
5
4
3
2
1
0
RDJMPRS R
JUMPER7 to JUMPER0
Note
1. The bit fields for the jumpers are explained in Table 25.
1996 Jun 19
25