Motorola DSP56156 Manual page 309

Application:
Codec
Input Select
0 = MIC Selected
1 = AUX Selected
Codec Enable
0 = Disabled
1 = Enable
Codec Interrupt Enable
0 = Disabled
1 = Enabled
Codec Control Register (COCR)
X:$FFC8 Read/Write
Reset = $0000
Codec Status Register (COSR)
X:$FFE8 Read Only
Reset = $04
MOTOROLA
DSP56156 Codec Programming Sheet
Microphone Gain
Select Bits
00 = 125
00 = -6dB
01 = 128
01 = 0dB
10 = 105
10 = 6dB
11 =
11 = 17dB
Mute Bit
0 = Output Muted
1 = Output NOT Muted
15 14 13 12 11 10
COIE COE
Codec Transmit Data Empty
0 = Wait
1 = Write Data
Codec Receive Data Full
0 = Wait
1 = Read Data
Figure C-12 Codec Status Register (COSR)
PROGRAMMING SHEETS
Codec Ratio Select Bits
Ratio A/D (dB) D/A (dB)
-0.618 -0.206
0.0 0.0
0.859 -1.720
81 0.118 -3.974
9 8
INS MGS1 MGS0 MUT CRS1 CRS0
Codec Transmit Underrun Error Flag
0 = OK
1 = Error
Codec Receive Overrun Error Flag
0 = OK
1 = Error
Date:
Programmer:
Sheet 1 of 2
Audio Level Control Bits
0000 = -20dB
1000 =
0001 = -15dB 1001 =
0010 = -10dB
1010 = 12dB
0011 = -5dB 1011 = 18dB
0100 = 0dB
1100 = 24dB
0101 = 6dB 1101 = 30dB
0110 = 12dB
1110 = 30dB
0111 = 18dB 1111 = 35dB
7 6 5 4 3 2
* * * *
VC3 VC2
0 0 0 0
0
7 6 5 4 3 2
* * * *
CRDF CTDE CROE CTUE
0 1 0
0 0 0 0
= Reserved, Program as zero
*
C - 25
0dB
6dB
1 0
VC1 VC0
1 0
0