Product Brief
TransDimension
UHC124
TransDimension Inc. — Proprietary
5
36
VSS
Ground
Ground. All four pins must be connected.
37
DP2
Bidir
Port 2 Differential Data (+) for USB I/O.
38
DM2
Bidir
Port 2 Differential Data (-) for USB I/O.
39
DP3
Bidir
Port 3 Differential Data (+) for USB I/O.
40
DM3
Bidir
Port 3 Differential Data (-) for USB I/O.
41
DP4
Bidir
Port 4 Differential Data (+) for USB I/O.
42
DM4
Bidir
Port 4 Differential Data (-) for USB I/O.
43
TEST4
Bidir
Test Signal I/O: used only for factory testing; working in output mode during
normal operation.
44
D0
Bidir
Data bus: Bit 0.
45
D1
Bidir
Data bus: Bit 1.
46
D2
Bidir
Data bus: Bit 2.
47
D3
Bidir
Data bus: Bit 3.
48
VDD
Power
3.3V Power Supply. All four pins must be connected.
49
VSS
Ground
Ground. All four pins must be connected.
50
D4
Bidir
Data bus: Bit 4.
51
D5
Bidir
Data bus: Bit 5.
52
D6
Bidir
Data bus: Bit 6.
53
D7
Bidir
Data bus: Bit 7.
54
/RESET
In
Hardware Reset: resets entire USB system; active low.
55
/WR
In
Bus Write Strobe: active low.
56
/RD
In
Bus Read Strobe: active low.
57
TMS0
In
Test Mode Select: used only for factory testing; connect to VSS for normal
operation.
58
TMS1
In
Test Mode Select: used only for factory testing; connect to VSS for normal
operation.
59
TMS2
In
Test Mode Select: used only for factory testing; connect to VSS for normal
operation.
60
TMS3
In
Test Mode Select: used only for factory testing; connect to VSS for normal
operation.
61
/INT
Ouput
Interrupt: generated for microprocessor; active low.
62
ADS
In
Address/Data Select: see description of Pin MODE; When MODE = 1, this pin
has no effect, and it should be tied to VSS for noise immunity.
63
GNDP
In
Voltage Reference: for built-in power on reset (POR), connect to VSS (ground)
for normal operation.
64
VSS
Ground
Ground. All four pins must be connected.
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