Tadpole SPARCbook 3 series, Reference Manual

Page: 117 / 216

ISDN and 16-bit Audio
8-21
Audio CODEC
Bit 7 HE – Headphone output enable
0 = Headphone disabled
1 = Headphone enabled
Bit 6 LE – Line Output Enable
0 = Line Output disabled
1 = Line Output enabled
Bits 5:0 Output attenuation for left channel. LO(5) is MSB. LO(0)
represents 1.5 dB.
0 = no attenuation
Output Setting
Bit 6 SE – Speaker Enable
0 = Speaker disabled
1 = Speaker enabled
Bits 5:0 Output attenuation for right channel. LO(5) is MSB. LO(0)
represents 1.5 dB. 0 = no attenuation
Intput Setting
Bits 7:6 PIO bits – Not used
Bit 5 OVR – Overrange. This bit when set indiactes that an
overrange condition has occured. It remains set until written
with a zero. Writing a 1 enables the overrange detection.
The bit remains at 0 until an overrange occurs.
Bit 4 IS – Input selection
0 = Line level input
1 = Microphone level input
Bits3:0 LG(3:0) – Input gain for left channel
LG(3) is the MSB. LG(O) represents 1.5 dB. Full gain is
22.5 dB.
0 = no gain
SE RO(5:0)
7
3
2
4
1 0
5 6
OVR
LG(3:0)
7
3
2
4
1 0
5 6
PIO
IS
S3GX_TRMBook Page 21 Friday, September 19, 1997 11:39 am