Specifications

ESS Technology, Inc. SAM0025A-062397 63
ES1879 DATA SHEET
REGISTERS
PRELIMINARY
ESS Mixer Registers
This section provides a summary of the ESS mixer registers followed by a detailed description of each register.
Table 25 ESS Mixer Register Summary
RegD7D6D5D4D3D2D1D0Remark
00h
Write: reset mixer Reset mixer
14h
Audio 1 playback volume left Audio 1 playback volume right Audio 1 playback volume
1Ah
Mic mix volume left Mic mix volume right Mic mix volume
1Ch
xx
F1
a
x
F0
a
Record source Record source select
1Eh
xx
F2
a
x x x Stereo x Stereo flag
32h
Master volume left Master volume right Master volume
36h
Music DAC volume left Music DAC volume right Music DAC volume
38h
CD (AuxA) volume left CD (AuxA) volume right CD (AuxA) volume
3Ah
AuxB volume left AuxB volume right AuxB volume
3Ch
PC speaker volume PC speaker volume
3Eh
Line volume left Line volume right Line volume
40h
ES1879 identification value (read-only) ES1879 identification value
42h
Input override Record source Record volume Serial mode input control
44h
Output over-
ride
Output signal Output volume Serial mode output control
46h
Analog con-
trol override
Music mixer
test
Left ADC Right ADC Mono enable x FDXO enable FDXI enable
Serial mode miscellaneous analog
control
48h
Serial enable Data format Serial reset
ES689/
ES69x inter-
face enable
Active low
sync
DSP test
mode
0
Telegaming
mode enable
Serial mode miscellaneous control
4Ah
0 2’s complement filter divider Test register
4Ch
Filter
override
0 2’s complement filter divider Serial mode filter divider control
4Eh
Transmit source
Transmit
length
Transmit
mode
Receive target
Receive
length
Receive
mode
Serial mode format/source/target con-
trol
50h
0
Spatializer
enable
Reset
release
Mono mode
enable
Automatic
effect limiter
enable
Spatializer enable and mode
control
52h
0 Spatializer level/limit Spatializer level/limit
54h
1 0 0 0 1 1 1 1 Spatializer auto-limit scale factor 1
56h
1 0 0 1 0 1 0 1 Spatializer auto-limit scale factor 2
58h
Auto-limit increase rate Auto-limit decrease rate Spatializer auto-limit mode rate
5Ah
Auto-limit low-level effect boost
Threshold
enable
Auto-limit energy threshold
Spatializer auto-limit threshold and
offset
5Ch
Left/Right
state flag
Signal
processor
test mode
ADC test
mode
Accelerated
timing enable
Auto-limit test
mode
THD flag DOWN flag UP flag Spatializer test control
5Dh
ES978 mappable playback volume left ES978 mappable playback volume right ES978 mappable playback volume
5Eh
Test data Spatializer test data
5Fh
ES978 mappable record volume left ES978 mappable record volume right ES978 mappable playback volume
60h
0 Mute Left master volume Left master volume counter
61h
0 Mute Left volume counter Left hardware volume counter
62h
0 Mute Right master volume Right master volume counter
63h
0 Mute Right volume counter Right hardware volume counter
64h
Split mode
enable
MPU-401
IRQ mask
Volume count
HWV IRQ
flag
HWV operation mode
HWV inter-
rupt mask
SB Pro mas-
ter volume
disable
Master volume control