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34
HCD-GTX88
HCD-GTX88
6-4. BLOCK DIAGRAM — USB SECTION —
(Page 31)
77
78
3
4
5
VBUS+5V
USB CONTROL
IC901
VBUS
POWER ON/OFF
SWITCH
IC915
SYSTEM CONTROL
IC401 (4/6)
S-RAM
IC921
CN952
1
4
(USB)
VBUS
D–
D+
GND
OUT
P75/USBOC
P76/USBPON
D–
OE
A0
I
A2
A3
I
A6
A7
I
A10
A11
I
A15
WE
LB
UB
CE
D+
IN
FLG
EN 1
80
79
PF1/RXDO
DATA
85
PF2/SCLK0/CTSO/CLK/TB0OUT0
CLK
86
PN5/HSS1/SCL1
GATE
94
PN4/HSS0/SDA1
A IN
93
PN3/HSCLK
BCK IN
92
P83/CS3/WAIT/TA5OUT
LRCKIN
71
P64/A20
P63/A19
P62/A18
P61/A17
USBRST
USB SERIAL TXDO
USB SERIAL RXDO
USB SERIAL RTSO
USB SERIAL CTSO
BUS3
58
BUS2
57
BUS1
56
BUS0
55
P66/A22
CCE
60
P65/A21
BUCK
59
PG3
REQ
96
PG2
ST REQ
97
P70/RD
P71/SRWR
18
I
25
•
28
I
35
64
41
17
65
P72/SRLLB
P73/SRLUB
66
39
40
67
P82/CS2 70
16
RESET
PC0/INT0
1
31
38
2
PF0/TXD0
PF4/RXD1/SPDI
84
34
35
88
PF3/TXD1/SPD0 87
X1 75
X2 73
36
P00/D0
I
P07/D7
P10/D8
I
P17/D15
37
I
43
•
46
I
54
44
I
42
•
27
I
24
•
21
I
18
•
5
I
1
I/O0
I
I/O3
I/O4
I
I/O7
I/O8
I
I/O11
I/O12
I
I/O15
7
I
10
•
13
I
16
•
29
I
32
•
35
I
38
P41/A1
I
P47/A7
P50/A8
I
P60/A16
RF/SERVO
SECTION
B
X901
9kHz
• Signal Path
: USB
: DIGITAL
Summary of Contents for HCD-GTX88
Page 103: ...103 HCD GTX88 MEMO ...