BU94601KV_12 Datasheet, PDF (16/70 Pages) Rohm – AAC/WMA/MP3 +SD Memory Card + iPod

BU94601KV BU94603KV BU94604BKV
Datasheet
6. SEL_APLAY
Auto play selection signal at power ON/device recognition
Signal name I/O
Function
Remarks
SEL_APLAY I
Auto play selection signal at
device recognition
H: Stop after recognizing device, L: Play after
recognizing device
SEL_APLAY selects whether the audio data in the memory is to be automatically played when a memory device
(USB memory or SD card) is inserted at power ON or when the system recognizes the memory device inserted.
SEL_APLAY can be selected only in MODE1. Since selection of SEL_APLAY is ignored in MODE2/3, select it
from Pull-up. When MODE2/3 is selected, audio data is halted after the system recognizes a device.
7. SEL_UTPKT
USB test packet
Signal name I/O
Function
SEL_UTPKT I USB test packet send
Remarks
H: Disabled, L: USB test packet send
A test packet signal is output from USB_DP terminal or USB_DM terminal when L is set to SEL_UTPKT at power
ON.
Once enabled, SEL_UTPK keeps that state regardless of operation modes and sends out a test packet.
A test packet signal is continuously output until power turns OFF. Use SEL_UTPKT when evaluating the USB
terminal. In other cases, use it from Pull-up.
8. Audio line output
Audio line output
Signal name I/O
Function
LDACO O Lch audio line output
-
RDACO O Rch audio line output
-
Remarks
These signals are decoded MP3 music audio data line outputs.
They turn ON when the line output is selected by SEL_DOUT terminal.
Sample rate converter converts the sample rate 48kHz and 32kHz to 44.1kHz and outputted.
9. MUTE control output
Audio MUTE
Signal name I/O
Function
AMUTE O Audio mute control terminal
Remarks
H: At audio output, L: At mute
This terminal outputs H at audio output and L at mute.
This signal can be used as flag for external amplifier when mute audio output at power ON or FF/FB (silence).
Figure 8 shows the operation waveform.
AMUTE
At start of play
23 ms at 0dB
At stop of play
23 ms at 0dB
LDACO, RDACO
Figure 8 Waveform at Audio Mute
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TSZ02201-0V2V0E600010-1-2
2012.07.12 Rev.001