OXU121HP Datasheet, PDF(12/22 Page) Oxford Semiconductor – USB On-The-Go Full-Speed Host and High-Speed Peripheral Controller

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OXU121HP Datasheet, PDF (12/22 Pages) Oxford Semiconductor – USB On-The-Go Full-Speed Host and High-Speed Peripheral Controller

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OXU121HP Data Sheet

Oxford Semiconductor, Inc.

Table 13 OXU121HP 100-Pin LQFP Pin Allocations (Sheet 2 of 3)

44, 45

No. Type(1)

Bits

Name

DPP, DMP

1 5I

RREF

VBUS

Description

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

Connect external reference resistor (12 Kâ¦ +/- 1%) to

VSSA

VBUS input used by the voltage comparators of the

OTG port for connection. This pin should be left

floating in a host-only application

1 OC

VBP

/EXVBO

1 IU

/OC

1 IU

Clock Interface (3 pins)

/PO

OSC1

OSC2

CLKCFG

Internal VBUS Charge Pump (3 pins)

PD_PMOS

Internal Voltage Regulator (2 pins)

EXT

VOUT

ENVREG

VBUS pulsing control. This pin is used only when the

OTG port is operating as a B-device

Turn on/off the external VBUS (5 V) for OTG operation

(1:VBUS off, 0: VBUS on) when using the external

VBUS source

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 chipâs 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

Turn on/off gang power for all host ports

Input. A 12 MHz or 30 MHz passive crystal should be

connected across the two pins (OSC1 and OSC2).

Optionally, a 12 MHz or 30 MHz oscillator can be

connected to OSC1 while keeping OSC2 unconnected

Output

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

OSC1

1 = 30 MHz crystal or 30 MHz 3.3 V oscillator input on

OSC1

Internal charge pump output for P-MOSFET (optional

switch on the VOUT)

Internal charge pump output for N-MOSFET

Internal charge pump output voltage feedback pin

Enables the internal voltage regulator if asserted. If

not used, this pin should be tied to VSS

External--Free Release

DS-0040 Aug 06

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