Specifications

ESS Technology, Inc. SAM0023-122898 59
ES1869 DATA SHEET
REGISTERS
Master Volume Register (32h, R/W)
On reset, this register assumes the value of 88h.
This register provides backward-compatible access to
master volume. New applications can also use registers
60h and 62h, which have more resolution.
FM Volume Register (36h, R/W)
On reset, this register assumes the value of 88h.
AuxA (CD) Volume Register (38h, R/W)
On reset, this register assumes the value of 00h.
AuxB Volume Register (3Ah, R/W)
On reset, this register assumes the value of 00h.
PC Speaker Volume Register (3Ch, R/W)
On reset, this register assumes the value of 04h.
Line Volume Register (3Eh, R/W)
On reset, this register assumes the value of 00h.
ES1869 Identification Value (40h, R)
To identify the ES1869, mixer register 40h returns the
following values on four successive reads:
18h, 69h, A[11:8], A[7:0]
where 18h and 69h are data reads indicating the part
number (1869) and A[11:0] is the base address of the
configuration device.
Serial Mode Input Control (42h, R/W)
Bit Definitions:
2:0 Extended
record
source
Selects the record source in Extended mode.
* The master volume inputs are the outputs of
the 3-D effect before master volume is applied.
However, the design of the ES1869 causes
some attenuation due to master volume in
some conditions before the 3-D effect. Unless
the master volume is at one of the top 7 levels
(0 dB, -.75 dB..-4.5 dB), there is -5.25 dB
attenuation between the output of the playback
mixer and the input to the 3-D effect. If the
master volume is at one of the top 7 levels, the
attenuation according to the master volume
level is determined prior to the input of the 3-D
effect.
Master volume left Master volume right
7 6 5 4 3 2 1 0
FM volume left FM volume right
7 6 5 4 3 2 1 0
AuxA (CD) volume left AuxA (CD) volume right
7 6 5 4 3 2 1 0
Bits Name Description
Bit 2 Bit 1 Bit 0 Record Source
0 0 0 Microphone
0 1 0 Aux A (CD)
1 0 0 Microphone
1 1 0 Line
0 0 1 L channel: Mic
R channel: Master vol
input (L+R)/2 *
0 1 1 L channel: AOUT_L
R channel: AOUT_R
1 0 1 Record mixer
1 1 1 Master volume inputs *
AuxB volume left AuxB volume right
7 6 5 4 3 2 1 0
Reserved PC speaker volume
7 6 5 4 3 2 1 0
Line volume left Line volume right
7 6 5 4 3 2 1 0
ES1869 identification value
7 6 5 4 3 2 1 0
Input override Record source select Record level
7 6 5 4 3 2 1 0
Bits Name Description
7 Input
override
1 = The record source select and record level
fields take effect and override settings in mixer
registers 1Ch and B4h. Serial mode is enabled
when input pin DCLK is clocking and either the
external pin SE is high or bit 7 of mixer register
48h is high.
0 = no effect.