BU94605AKV Datasheet, PDF (32/84 Pages) Rohm – AAC/WMA/MP3 +SD Memory Card +CD-ROM+MP3 Record

BU94605AKV BU94607AKV BU94702AKV BU94705AKV
11.2 Timing
Table 13. Timing
(Unless specified, Ta=25℃, VDD1=3.3V, Load=20pF)
Rating
Item
Symbol
Unit
min
typ
max
SS_CLK Low time
Tclk1
250
-
-
ns
SS_CLK High time
Tclk2
250
-
-
ns
pulse width controlled
-
-
-
100
ns
SS_CS Setup time
Tcs1
500
-
-
ns
SS_CS Hold time
Tcs2
250
-
-
ns
SS_CS High time
Tcsh
0
-
-
ns
SS_DI Setup time
Tdi1
100
-
-
ns
SS_DI Hold time
Tdi2
100
-
-
ns
SS_DO Output delay
Tdo1
-
150
-
ns
SS_DO Output delay
Tdo2
-
150
-
ns
Input High Voltage
Vih
VDD1*0.7
-
-
V
Input Low Voltage
Vil
-
-
VDD1*0.3
V
Datasheet
Remarks
Figure 34. SPI Timing (MODE0 format)
12. SEL_USB
Preference device detection selection signal
Signal name
I/O
Function
SEL_USB
I Preference device detection selection signal
H: USB, L: SD
Remarks
The signal selects which device should be detected with the highest priority at power ON.
When SEL_USB=H, the microcomputer detects the preference device from USB. When SEL_USB=L, it detects the
preference device from SD.
SEL_USB is set only at power ON only. Note that selection change will be ignored after power ON.
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2012.12.10 Rev.002