BU94601KV_12 Datasheet, PDF (23/70 Pages) Rohm – AAC/WMA/MP3 +SD Memory Card + iPod

BU94601KV BU94603KV BU94604BKV
Datasheet
15. SD I/F
SPI interface for SD memory card I/F
Signal name I/O
Function
Remarks
SD_CS O SPI chip select
-
SD_CLK O SPI clock
-
SD_DI O SPI data input
-
SD_DO I SPI data output
-
SD_CON
I
SD card connect detection
terminal
H: Not detecting SD card connection.
L: Detecting SD card connection.
These I/F enable communication with SD memory cards through SD memory card slots.
Since SD memory card slot requires detecting insertion of SD memory card, use of slot equipped with SD memory
card detecting terminal and connection to SD_CON terminal are required.
SD_CON terminal is pulled up within the device and detects SD memory card connection by L input.
15.1 SD I/F Timing
(Unless specified, Ta=25℃, VDD1=3.3V, Load : 20pF,10kΩ)
Parameter
Symbol
Min
Typ
SD_CS Setup time
Tcss
-
0.25
SD_CS Hold time
Tcsh
-
1.15
SD_CLK Clock Frequency
Tclk
-
4.23
SD_DI Output delay
Tod
-20
-
SD_DO Data in Setup time
Tds
20
-
SD_DO Data in Hold time
Tdh
120
-
Output High Voltage
Voh
0.625*VDD1
-
Output Low Voltage
Vol
-
-
Max
-
-
-
20
-
-
-
0.25*VDD1
unit
us
us
MHz
ns
ns
ns
V
V
Figure 22 Timing chart of SPI for SD memory card
16. MCHNG
Playing sound tune number detection output
Signal name I/O
Function
Remarks
MCHNG
O
Music tune number change
detection output signal
H: Playing, L: Tune completed/stopped
This signal outputs change of file to be played during playing MP3 file in the memory device.
MCHNG correctly outputs "H" during MP3 decode sequence, outputs "L" during "STOP" status.
Connect it to the interruption port of the microcomputer.
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TSZ02201-0V2V0E600010-1-2
2012.07.12 Rev.001