Ricoh G081, Service Manual

Page: 220 / 272

USB
G081/G092 6-58 SM
6.7.3 USB CONNECTORS
USB is a serial protocol and a physical link that transmits all data on a single pair of
wires. Another pair provides power to downstream peripherals.
The USB standard specifies two types of connectors, type “A” connectors for
upstream connection to the host system, and type “B” connectors for downstream
connection to the USB device.
Type “A” connector Type “B” connector
6.7.4 PIN ASSIGNMENT
The controller has a type “B” receptacle (CN10).
Pin No. Signal Description Wiring Assignment
1 Power Red
2 Data – White
3 Data + Green
4 Power GND White
G081D945.WMF G081D952.WMF
Flash
ROM
Flash
ROM
ASIC
(KLAVIER)
ROM
DIM
M
I/
F
x
2
SD RAM DIMM I/F x2
NVRAM Opton I/F
E
th
er
n
et I/
F
E
n
g
in
e In
ter
face
(C
N
1)
HDD Interface
IEEE
1284 I/F
PCM
C
IA CARD I/F
CPU
ASIC
(COMIC)
Op
tio
n
I/
F
IE
E
E
12
84 I
/F
B
o
ar
d
USB Board
USB I/F
Controller Board
1 2
3 4
G081D932.WMF