Oxford Semiconductor, Inc.
OXU140CM Data Sheet
Table 13 OXU140CM 128-Pin LQFP Pin Allocations (Sheet 2 of 3)
(1)
Pin
No.
Pins
Name
Description
Type
101, 98
2
1
B
B
DM , DP
Data lines for Host Port 2, a dedicated USB host
port. If not used, these two pins should be left floating
2
2
60
93
R
Connect external reference resistor (12 KΩ +/- 1%)
REF
to V
SSA
1
5I
VBUS
VBUS input used by the voltage comparators of the
OTG port for connection. This pin should be left
floating in a host-only application
79
78
1
1
O
O
VBP
V
pulsing control. This pin is used only when Port
BUS
1 is an OTG port for a B-DEVICE.
Turn on/off the external V (5 V) for OTG
/EXVBO
BUS
operation (1:V
off, 0: V
on) when using the
BUS
BUS
external charge pump
77
81
1
1
IU
IU
/OC
ID
Over current condition indicator for powered host
ports
Connected to the ID pin of the mini-AB connector for
OTG applications. With the help of an internal pull-up
resistor, this pin determines the chip’s responsibility
in an OTG application (0: A-device, 1:B-device)
80
1
O
I
/PO
Turn on/off gang power for all host ports
Clock Interface (3 pins)
82
1
CLKCFG
The state of this pin is used to indicate whether a 12
MHz or a 30 MHz crystal/oscillator is being used.
CLKCFG -- Frequency
0--12-MHz crystal; 12-MHz 3.3 V oscillator input on
OSC1
1--30-MHz crystal; 30-MHz 3.3 V oscillator input on
OSC1
64
63
1
1
I
OSC
OSC
A 12-MHz or 30-MHz passive crystal should be
connected across the two pins. Optionally, a 12 MHz
or 30-MHz oscillator can be connected to OSC1
while keeping OSC2 unconnected
1
2
O
MMC/CE-ATA (13 pins)
25
26
1
1
8
MO
CECLK
CECMD
SD/MMC/CE-ATA CLK output (0-48 MHz)
SD/MMC/CE-ATA CMD
MBUS
MBUS
37, 36, 35, 32, 31,
30, 29, 27
CEDAT[7:0]
SD/MMC/CE-ATA 1,4 or 8-bit data bus
67
1
1
1
O
O
O
/CE3P3V_EN
/CE1P8V_EN
/CEMOT_EN
On/off control for MMC 3.3 V interface power
On/off control for MMC 1.8 V interface power
On/off control for HDD motor power
103
74
Internal VBUS Charge Pump (3 pins)
87
1
O
PD_PMOS
Internal charge pump output for P-MOSFET (optional
switch on the VOUT)
92
86
1
1
O
I
EXT
Internal charge pump output for N-MOSFET
VOUT
Internal charge pump output voltage feedback pin
DS-0038 Jul 06
External--Free Release
11
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