ak4342 AKM Semiconductor, Inc., ak4342 Datasheet - Page 28

• Manufacturer Part Number: ak4342
• Description: 24-bit Stereo Dac With Hp-amp & 2v Line-out
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
(4) Power Up the charge pump circuit, DAC and VCOM; PMCP bit = PMDAC bit = PMVCM bit = “0”
(5) When PMCP bit and PMHP bit (PMLO bit) are set to “1” at the same time or PMHP bit (PMLO bit) is set to “1”
(6) Power Up the headphone (lineout) amplifiers; PMHP bit (PMLO bit) = “0”
(7) Release the mute state of headphone (lineout) amplifiers; HMUTEL bit = HMUTER bit (LMUTE bit) = “1”
(8) Mute headphone (lineout) amplifiers: HMUTEL = HMUTER (LMUTE bit) = “0”
(9) Power-down the headphone (lineout) amp; PMHP bit (PMLO bit) = “1”
(10) Power down the charge pump circuit, DAC and VCOM; PMCP bit = PMDAC bit = PMVCM bit = “1”
MS0506-E-02
during the charge pump circuit is powered-up, headphone (lineout) amplifier is powered-up after the charge pump
circuit is powered-up.
PVEE pin goes to PVEE voltage according to the setting of FS3-0 bits (See Table 9).
(lineout) amplifiers depends on PUT1-0 bits and FS3-0 bits.
The headphone (lineout) amplifiers are powered-down. The power-down time of headphone (lineout) amplifiers
depend on PUT1-0 bits and FS3-0 bits.
PVEE pin becomes “0V” according to the time constant of internal resistor and capacitor of PVEE and HVEE
pins. Internal resistor is typically 17.5kΩ. The charge pump circuit may be powered-up during this period.
The headphone (lineout) amplifiers are in the normal state after the transition time passes. The transition is
executed via soft changes. The transition time depends on PTS1-0 bits and FS3-0 bits.
LPGA4-0, PGAL4-0, PGAR4-0 and PGAC bits should not be changed during this period.
The headphone (lineout) amplifiers are in the mute state after the transition time passes. The transition is executed
via soft changes. The transition time depends on PTS1-0 bits and FS3-0 bits.
LPGA4-0, PGAL4-0, PGAR4-0 and PGAC bits should not be changed during this period.
The headphone (lineout) amplifiers are in mute state and have some DC offset. The power up time of headphone
PMHP and PMLO bits should not be changed during this period.
PMHP and PMLO bits should not be changed during this period.
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“0”
“1”
“1”
“1”
[AK4342]
“0”
2006/07
“0”