WM8722 Datasheet, PDF (15/23 Pages) Wolfson Microelectronics plc – Stereo DAC with Integrated Tone Generator and Line/Variable Level Outputs

Advanced Information
WM8722
REGISTER MAP
The WM8722 controls the device functions using 15 program registers, each of which is 16-bits long.
These registers are all loaded via the serial control interface in either 2 or 3-wire mode.
There are two type of control word; either TFRQ, the tone frequency word, which is a single address
bit followed by 15 data bits, or other types, which have 6 address bits, and 10 bits of data. Other
types have the lead address bit inverted compared to TFREQ words, allowing use of a single write to
load the required frequency.
REG
TFREQ
R0
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
B15 B14 B13 B12 B11 B10 B9
1
0
0
0
00
0
0
0
01
0
0
0
10
0
0
0
11
0
0
1
00
0
0
1
01
0
0
1
10
0
0
1
11
0
1
0
00
0
1
0
01
0
1
0
10
0
1
0
11
0
1
1
00
0
1
1
01
Table 5. Mapping of Program Registers
B8
LDL
LDR
res
BOTH
BOTH
BOTH
BOTH
BOTH
BOTH
BOTH
BOTH
res
F2F
B7
B6
F[14:0]
PL[3:0]
res
res
res
res
res
res
ZCEN
ZCEN
res
res
res
res
res
res
res
res
SQR TFIN
B5
B4 B3
B2
B1 B0
DAL [7:0]
DAR[7:0]
IW1 IW0 PWD DE MU
res
res res ATC LRP I2S
MUTE
MTRIML[4:0]
MUTE
MTRIMR[4:0]
LVOL[6:0]
RVOL[6:0]
M6DB0
LMXSEL(4-0)
M6DB1
RMXSEL(4-0)
M6DB2
LVMXSEL(4-0)
M6DB3
RVMXSEL(4-0)
TTIM[7:0]
MUTE
TVOL[4:0]
WOLFSON MICROELECTRONICS LTD
AI Rev 1.5 May 2000
15