OXU121HP Data Sheet
Oxford Semiconductor, Inc.
Table 13 OXU121HP 100-Pin LQFP Pin Allocations (Sheet 2 of 3)
(1)
Pin
No.
Bits
Name
Description
Type
44, 45
2
B
DP , DM
Data lines for USB peripheral port, which can serve
as an OTG port in combination with host port 1. If not
used, these pins should be left floating
P
P
46
72
1
1
B
R
Connect external reference resistor (12 KΩ +/- 1%) to
REF
V
SSA
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
60
59
1
1
OC
O
VBP
VBUS pulsing control. This pin is used only when the
OTG port is operating as a B-device
/EXVBO
Turn on/off the external V
(5 V) for OTG operation
BUS
(1:V
off, 0: V
on) when using the external
BUS
BUS
VBUS source
58
62
1
1
IU
IU
/OC
ID
Over current condition indicator for powered host
ports. Pull-up is always enabled
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). Pull-up
can be disabled through register 0x038, bits 7:6.
Default is pull-up
61
1
O
I
/PO
Turn on/off gang power for all host ports
Clock Interface (3 pins)
50
1
OSC
Input. A 12 MHz or 30 MHz passive crystal should be
1
2
connected across the two pins (OSC and OSC ).
1
2
Optionally, a 12 MHz or 30 MHz oscillator can be
connected to OSC while keeping OSC unconnected
1
2
49
63
1
1
O
I
OSC
Output
CLKCFG
Indicates whether a 12 MHz or a 30 MHz crystal/
oscillator is being used.
0 = 12 MHz crystal or 12 MHz 3.3 V oscillator input on
OSC
1
1 = 30 MHz crystal or 30 MHz 3.3 V oscillator input on
OSC
1
Internal VBUS Charge Pump (3 pins)
68
1
O
PD_PMOS
Internal charge pump output for P-MOSFET (optional
switch on the VOUT)
71
67
1
1
O
I
EXT
Internal charge pump output for N-MOSFET
VOUT
Internal charge pump output voltage feedback pin
Internal Voltage Regulator (2 pins)
79
1
I
ENVREG
Enables the internal voltage regulator if asserted. If
not used, this pin should be tied to V
SS
12
External--Free Release
DS-0040 Aug 06
OXFORD [ OXFORD SEMICONDUCTOR ]
