ak4589 AKM Semiconductor, Inc., ak4589 Datasheet - Page 37

• Manufacturer Part Number: ak4589
• Description: 2/8-channel Audio Codec With Dir
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
When RSTN1 bit = “0”, ADC and DACs are powered-down but the internal register are not initialized. The analog
outputs go to VCOM voltage, DZF1-2 pins go to “H” and SDTO1 pin goes to “L”. Because some click noise occurs,
the analog output should muted externally if the click noise influences system application. Table 15 shows the power-up
sequence.
Notes:
MS0339-E-00
Reset Function
(1) The analog part of ADC is initialized after exiting the reset state.
(2) Digital output corresponding to analog input and analog output corresponding to digital input have the group
(3) ADC output is “0” data at the power-down state.
(4) Click noise occurs when the internal RSTN bit becomes “1”. Please mute the digital output externally if the click
(5) When RSTN1 bit = “0”, the analog outputs go to VCOM voltage.
(6) Click noise occurs at 4∼5/fs after RSTN1 bit becomes “0”, and occurs at 1∼2/fs after RSTN1 bit becomes “1”.
(7) The external clocks (MCLK, BICK1 and LRCK1) can be stopped in the reset mode. When exiting the reset
(8) DZF pins go to “H” when the RSTN1 bit becomes “0”, and go to “L” at 6~7/fs after RSTN1 bit becomes “1”.
(9) There is a delay, 4~5/fs from RSTN1 bit “0” to the internal RSTN bit “0”.
delay (GD).
noise influences system application.
This noise is output even if “0” data is input.
mode, “1” should be written to RSTN1 bit after the external clocks (MCLK, BICK1 and LRCK1) are fed.
DAC Internal
DAC In
DAC Out
Clock In
MCLK,LRCK1,
BICK1
DZF1/DZF2
ADC Internal
ADC In
ADC Out
RSTN1 bit
Internal
RSTN1 bit
(Digital)
(Analog)
(Analog)
(Digital)
State
State
Normal Operation
Normal Operation
GD
Figure 15. Reset sequence example
GD
(2)
(2)
Digital Block Power-down
Digital Block Power-down
(6)
(7)
4~5/fs (9)
Don’t care
“0”data
“0”data
(5)
- 37 -
(3)
(6)
1~2/fs (9)
4∼5/fs (8)
Init Cycle
516/fs
(1)
Normal Operation
(4)
Normal Operation
GD
GD
[AK4589]
2004/09