MAX9888 Maxim Integrated Products, MAX9888 Datasheet - Page 102

• Manufacturer Part Number: MAX9888
• Description: Stereo Audio CODEC
• Manufacturer: Maxim Integrated Products

DataSheet.in
Stereo Audio CODEC
with FLEXSOUND Technology
The IC measures the voltage applied to SPKLVDD (typi-
cally the battery voltage) and reports the value in regis-
ter 0x03. This value is also used by the speaker limiter
102
Table 36. Battery Measurement Registers
REGISTER
0x4C
0x03
BIT
4
3
2
1
0
7
6
1
VBATEN
NAME
SHDN
JDWK
VBAT
Battery Measurement
Battery Voltage
Read VBAT when V
= 0 to allow proper speaker amplifier signal processing. Calculate the battery voltage
using the following formula:
V
See the Power Management section.
Battery Measurement Enable
Enables an internal ADC to measure V
0 = Disabled (register 0x03 readable and writeable)
1 = Enabled (register 0x03 read only)
See the Headset Detection section.
BATTERY
= 2.55V + [VBAT/10]
BATEN
circuitry to set accurate thresholds. When the battery
measurement function is disabled, the battery voltage is
user programmable.
= 1 to determine V
DESCRIPTION
SPKLVDD
SPKLVDD
.
. Program VBAT when V
BATEN