MAS9090B Micro Analog Systems, MAS9090B Datasheet - Page 19

• Manufacturer Part Number: MAS9090B
• Description: Low Voltage 14-bit Linear Codec
• Manufacturer: Micro Analog Systems

Address byte bits:
Data bits:
Notice the difference between power down and POR. Registers can be written in both power down/up states and
they retain their values in power down. Both data and control registers are cleared when POR bit (in CR10) is
written high or during power on reset (i.e. Vcc transition from 0 volts to 3-5 volts).
Power
CR0
CR1
CR2
CR3
CR4
CR5
CR6
CR7
CR8
CR9
CR10
CR11
CR14
Bit 0 reserved for future extensions
Bit 1 indicates the presence of a second byte. If cleared indicates single byte power up/down command
Bit 2 is write/read select bit
Bits 6 to 3 contain the address of register
Registers CR12, CR13, CR15 are not accessible
MSB bit (bit 7) of the address and data byte is always clocked first into or out from CI and CO pins
Bit 7 ‘P’ controls the power up/down state of the chip. P = 1 means power down
All registers are cleared during power on reset or by writing to bit POR of CR10
Default value for all bits is zero.
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
X
7
X
X
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
X
X
0
5
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
X
X
4
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
X
X
3
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
X
X
2
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
X
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
Write
Read
Write
Read
Write
Read
Write
Read
Write
Read
Write
Read
Write
Read
Write
Read
Write
Read
Write
Read
Write
Read
Write
Read
DM1
POR
VS
BE
F1
7
Tone gain [4:7]
SP1 gain [4:7]
DM0
SCA
TX gain [4:7]
TE
F0
BI
6
Binary word used for calculating f1
Binary word used for calculating f2
HPT
CM
DO
SI
5
For testing purposes only
Output data [0:7]
Input data [0:7]
OE1
EXT
MA
MR
4
Duty cycle for BZ (0:5)
OE2
MX
IA
F1
3
LI
Side tone gain [0:3]
RTE
SP2 gain [0:3]
EN
FF
F2
LO
2
March 20, 1998
DA9090B.002
HPR
DFT
SN
B7
TS
1
HFT
SV
SE
DE
DL
0
19