TransDimension
Product Brief
UHC124
TransDimension Inc. — Proprietary
4
Pin Description
The UHC124 is delivered in a 64-pin LQFP package:
Pin#
Pin
Name
Pin
Type
Pin Description
1
VDD
Power
3.3V Power Supply. All four VDD pins must be connected.
2
A0
In
Address bus: bit 0 (least significant bit).
3
A1
In
Address bus: bit 1.
4
A2
In
Address bus: bit 2.
5
A3
In
Address bus: bit 3.
6
A4
In
Address bus: bit 4.
7
A5
In
Address bus: bit 5.
8
A6
In
Address bus: bit 6.
9
A7
In
Address bus: bit 7.
10
A8
In
Address bus: bit 8.
11
A9
In
Address bus: bit 9.
12
A10
In
Address bus: bit 10.
13
A11
In
Address bus: bit 11.
14
MODE
In
Memory Access Mode.
MODE = 1: Non-multiplexed memory access.
MODE = 0: Multiplexed memory access with auto-incremented address.
15
/CS
In
Chip Select: active low.
16
VSS
Ground
Ground. All four pins must be connected.
17
OSC1
In
Oscillator Input: input to the inverting oscillator amplifier.
18
OSC2
Out
Oscillator Output: output of the inverting oscillator amplifier.
19
LPF
Passive
PLL Filter: connecting to a passive RC network.
20
VDD
Power
3.3V Power Supply. All four pins must be connected.
21
TEST0
Bidir
Test Signal I/O: used only for factory testing; working in output mode during
normal operation.
22
TEST1
Bidir
Test Signal I/O: used only for factory testing; working in output mode during
normal operation.
23
TEST2
Bidir
Test Signal I/O: used only for factory testing; working in output mode during
normal operation.
24
TEST3
Bidir
Test Signal I/O: used only for factory testing; working in output mode during
normal operation.
25
/OC1
In
Over Current condition input for Port 1; active low.
26
/OC2
In
Over Current condition input for Port 2; active low.
27
/OC3
In
Over Current condition input for Port 3; active low.
28
/OC4
In
Over Current condition input for Port 4; active low.
29
/PO1
Out
Power On Switch for Port 1; active low.
30
/PO2
Out
Power On Switch for Port 2; avtive low.
31
/PO3
Out
Power On Switch for Port 3; activel low.
32
/PO4
Out
Power On Switch for Port 4; activel low.
33
VDD
Power
3.3V Power Supply. All four pins must be connected.
34
DP1
Bidir
Port 1 Differential Data (+) for USB I/O.
35
DM1
Bidir
Port 1 Differential Data (-) for USB I/O.
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