Datasheet

(-119.25dB To 71.25dB, 0.75dB/Step)
0x00: Mute
0x01: -119.25dB
………………
0x9F = -0.75dB
0xA0 = 0dB
0xA1 = 0.75dB
………………
0xFF = 71.25dB
Reg 44h_HMIC Control 1 Register
Default: 0x0000
Register Name: HMIC_CTRL1
Bit
Read/Write
Default
Description
15:12
R/W
0x0
HMIC_M
debounce when Key down or key up
11:8
R/W
0x0
HMIC_N
debounce when earphone plug in or pull out
7
R/W
0x0
HMIC_DATA_IRQ_MODE
Hmic Data Irq Mode Select
0: Hmic data irq once after key down
1: Hmic data irq from key down, util key up
6:5
R/W
0x0
HMIC_TH1_HYSTERESIS
Hmic Hysteresis Threshold1
00: no Hysteresis
01: Pull Out when Data <= (Hmic_th2-1)
10: Pull Out when Data <= (Hmic_th2-2)
11: Pull Out when Data <= (Hmic_th2-3)
4
R/W
0x0
HMIC_PULLOUT_IRQ_EN
Hmic Earphone Pull out Irq Enable
00: disable 11: enable
3
R/W
0x0
HMIC_PLUGIN_IRQ_EN
Hmic Earphone Plug in Irq Enable
00: disable 11: enable
2
R/W
0x0
HMIC_KEYUP_IRQ_EN
Hmic Key Up Irq Enable
00: disable 11: enable
1
R/W
0x0
HMIC_KEYDOWN_IRQ_EN
Hmic Key Down Irq Enable
00: disable 11: enable
0
R/W
0x0
HMIC_DATA_IRQ_EN
Hmic Data Irq Enable
0: disable 1: enable
Reg 45h_HMIC Control 2 Register
Default: 0x0000
Register Name: HMIC_CTRL2