bu94604kv ROHM Co. Ltd., bu94604kv Datasheet - Page 4

• Manufacturer Part Number: bu94604kv
• Description: Usb Host Aac+wma+mp3 Decoder Lsi
• Manufacturer: ROHM Co. Ltd.

◇
（１） Power on Reset
（２） About compatibility in USB memory device and SD memory card
（３） About turning on the power supply
（４） About absolute maximum rating
（５） About GND Voltage
（６） About design of overheating malfunction preventive circuit
（７） About the short between terminals and the mounting by mistake
（８） About operation in strong electromagnetic field
◇Caution
External dimensions
please make the terminal RESETX High level after 5us after the oscillation of the system clock is steady. Moreover, please make the terminal
RESETX Low level during 5us or more when resetting it while operating.
Please apply neither voltage nor the temperature that exceeds the absolute maximum rating. Please execute physical measures for safety such as
fuse when it is thought to exceed the absolute maximum rating, and examine it so that the condition to exceed the absolute maximum rating is not
applied to LSI.
Please keep the terminal RESETX at the Low level when the power supply starts. After completely starting up 3.3V system power supply, afterwards,
According to the file structure and communication speed of an USB memory, SD memory card, this LSI might not play back correctly.
Current rush might flow momentarily by the order of turning on the power supply and the delay in IC with two or more power supplies, and note the
capacity of the power supply coupling, the power supply, and width and drawing the GND pattern wiring.
When the absolute maximum rating such as the applied voltage and the ranges of the operating temperature is exceeded, LSI might be destroyed.
a voltage that is lower than the terminal GND including excessive phenomenon.
Please design overheating malfunction preventive circuit with an enough margin in consideration of a permissible loss in the state of using actually.
Please note the direction and the gap of position of LSI enough about LSI when you mount on the substrate. LSI might be destroyed when mounting
by mistake and energizing. Moreover, LSI might be destroyed when short-circuited by entering of the foreign substances between the terminal and
GND, between terminals, between the terminal and the power supply of LSI.
Use in strong electromagnetic field has the possibility of malfunctioning and evaluate it enough, please.
In any state of operation must be the lowest voltage about the voltage of the terminal GND. Please actually confirm the voltage of each terminal is not
49
64
1.25
Figure 1. External dimension
48
1
BU94604KV
0.5±0.1
12.0±0.2
10.0±0.1
1 PIN mark
・
Block diagram
Lot No.
0.2
33
16
+0.05
-0.04
( UNIT : mm )
17
32
PKG: VQFP64
Drawing No. EX252-5001-1
0.08
0.08
4゜
0.145
S
+6゜
-4゜
M
+0.05
-0.03
REV. B
LED_ERROR/TEST9
LED_PUSB/TEST12
LED_PLAY/TEST10
LED_PSD/TEST11
LED_RANDOM
LED_ACCESS
LED_REPEAT
DVDD_M1
DVDDIO
TEST13
TEST14
TEST15
TEST16
TEST17
TMODE
DVSS
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
48
1
LDO
47
2
Sound Effecter
46
3
Audio DAC
45
Figure 2. Block diagram
4
Controller
44
System
5
AAC / WMA /
43
Decoder
6
MP3
42
7
Controller
41
8
iPod
PLL
40
9
39
10
38
11
37
File system
12
Controller
Controller
I2C I/F
SD I/F
Controller
FAT
36
13
USB
USB
PHY
35
14
34
15
33
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
ATEST1
AVDDC
TEST8
TEST7
TEST6
DVDD_M2
TEST5/
CLKOUT12
TEST4
DVSS
SD_CS
SD_DI
SD_CLK
SD_DO
SD_CON
DVDDIO
TEST3
4/4