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70
HCD-DH3/DH5BT/DH7BT
USB BOARD IC901 TMP92CD28AFG-6UJ5 (USB CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
/RESET
I
Reset signal input from the system controller "L": reset
2
DI
I
Ready to send signal input from the system controller
3, 4
NO USE
O
Not used
5
G-3
I
Function selection signal input terminal Fixed at "L" in this set
6
DVCC
-
Power supply terminal (+3.3 V)
7 to 9
NO USE
O
Not used
10
DVSS
-
Ground terminal
11
DVCC
-
Power supply terminal (+3.3 V)
12
RVOUT1
O
Reference voltage (+3.3 V) output terminal
13, 14
RVIN
I
Reference voltage (+3.3 V) input terminal
15
RVOUT2
O
Reference voltage (+3.3 V) output terminal
16
DVCC
-
Power supply terminal (+3.3 V)
17
DVSS
-
Ground terminal
18 to 25
D0 to D7
I/O
Two-way data bus with the S-RAM
26
DVSS
-
Ground terminal
27
DVCC
-
Power supply terminal (+3.3 V)
28 to 35
D8 to D15
I/O
Two-way data bus with the S-RAM
36
A0
O
Address signal output terminal Not used
37 to 43
A1 to A7
O
Address signal output to the S-RAM
44
DVSS
-
Ground terminal
45
DVCC
-
Power supply terminal (+3.3 V)
46 to 54
A8 to A16
O
Address signal output to the S-RAM
55 to 58
BUS0 to BUS3
O
Serial data output to the MP3 processor
59
/BUCK
O
Serial data transfer clock signal output to the MP3 processor
60
/CCE
O
Chip enable signal output to the MP3 processor
61
/RST
I
Reset signal input from the MP3 processor "L": reset
62
DVSS
-
Ground terminal
63
DVCC
-
Power supply terminal (+3.3 V)
64
RD
O
Output enable signal output to the S-RAM
Write enable signal output to the S-RAM
Lower-byte control signal output to the S-RAM
Upper-byte control signal output to the S-RAM
Boot mode selection signal input terminal "L": boot mode
Chip select signal output to the S-RAM
L/R sampling clock signal output to the MP3 processor
Function mode selection signal input terminal Fixed at "H" in this set
System clock output terminal (9 MHz)
74
DVSS
-
Ground terminal
75
X1
I
System clock input terminal (9 MHz)
76
DVCC
-
Power supply terminal (+3.3 V)
77
USBOC
I
Over current detection signal input terminal
78
USBPON
O
USB VBUS power on/off control signal output terminal "H": power on
79
D+
I/O
Two-way data (positive) bus with the USB connector
80
D-
I/O
Two-way data (negative) bus with the USB connector
81
AM0
I
Function mode selection signal input terminal Fixed at "H" in this set
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9
2
8
9
4
2
9
8
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9
2
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9
4
2
9
8
0
5
1
5
1
3
6
7
3
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