Specifications

58 SAM0023-122898 ESS Technology, Inc.
ES1869 DATA SHEET
REGISTERS
Register Detailed Descriptions
Reset Mixer (00h, W)
Audio 1 Play Volume (14h, R/W)
This register controls the playback volume of the first
audio channel. On reset, this register assumes the value
of 88h.
Mic Mix Volume (1Ah, R/W)
This register controls the playback volume of the Mic input.
On reset, this register assumes the value of 00h.
Extended Record Source (1Ch, R/W)
Bit Definitions:
6Fh Mono_In record volume left Mono_In record volume right Mono_In record volume
70h
Master
clock
Two’s complement rate divider Audio 2 sample rate
71h 0 0
1:New reg
A1h
1:4x mode
1:SCF2
bypass
1:SCF1
bypass
1:Async
mode
1:FM mix Audio 2 mode
72h Two’s complement filter rate divider Audio 2 filter clock rate
74h Two’s complement transfer count – low byte
Audio 2 transfer count reload
76h Two’s complement transfer count – high byte
78h
Single/demand
transfer
0
1: Auto-
initialize
0 0
Enable
second
channel
DMA
Enable full-
duplex
mode
Audio 2 control 1
7Ah
2nd chan-
nel IRQ
IRQ mask 0 0 0 Data sign
Stereo
/Mono
16-bit
/8-bit
Audio 2 control 2
7Ch Left channel volume Right channel volume Audio 2 DAC mixer volume
7Dh 0 0 0 0
Enable
+26 dB
mic amp
Mono_Out source
select
Enable
Mono_In
mix w/
AOUTL/R
Mic preamp, Mono_In and
Mono_Out
7Fh Reserved
Music
digital
record
I
2
S data
activity
I
2
S clock
activity
MODE pin
Enable I
2
S
connect to
music DAC
I
2
S interface
Table 24 ESS Mixer Registers Summary (Continued)
Reg D7 D6 D5 D4 D3 D2 D1 D0 Remark
Write: reset mixer
7 6 5 4 3 2 1 0
Audio 1 play volume left Audio 1 play volume right
7 6 5 4 3 2 1 0
Mic mix volume left Mic mix volume right
7 6 5 4 3 2 1 0
x x F1 Mute F0 Extended record source
7 6 5 4 3 2 1 0
Bits Name Description
7:6 – No function.
5 F1 Sound Blaster Filter Control bit F1 has no
equivalent function in the ES1869 and is
ignored.
4 Mute 1 = Mutes the input to the filters for recording.
This does not affect MONO_OUT.
3 F0 Sound Blaster Filter Control bit F0 has no
equivalent function in the ES1869 and is
ignored.