OM11077 NXP Semiconductors, OM11077 Datasheet - Page 334

• Manufacturer Part Number: OM11077
• Description: MODULE DIMM LPC2478 ARM7
• Manufacturer: NXP Semiconductors

Specifications of OM11077

• Accessory Type: Module Card
• For Use With/related Products: ARM-57TS-LPC2478
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-4742

NXP Semiconductors
7. Pin description
8. Clocking and power management
UM10237_4
User manual
7.1 USB device usage note
Once data has been received or sent, the endpoint buffer can be read or written. How this
is accomplished depends on the endpoint’s type and operating mode. The two operating
modes for each endpoint are Slave (CPU-controlled) mode, and DMA mode.
In Slave mode, the CPU transfers data between RAM and the endpoint buffer using the
Register Interface. See
this mode.
In DMA mode, the DMA transfers data between RAM and the endpoint buffer. See
Section 13–14 “DMA operation”
The device controller can access two USB ports indicated by suffixes 1 and 2 in the USB
pin names and referred to as USB port 1 (U1) and USB port 2 (U2) in the following text.
Table 291. USB device pin description
The USB device interface can be routed to either USB port1 (using USB_CONNECT1,
USB_UP_LED1, USB_D+1, USB_D−1) or USB port2 (using USB_CONNECT2,
USB_UP_LED2, USB_D+2, USB_D−2) to allow for more versatile pin multiplexing (see
Section 13–9.1.1 “USB Port Select register (USBPortSel - 0xFFE0
To use both ports for USB transfer, port1 has to be configured as host and port2 has to be
configured as device. See
device” on page 399
The USB device/host/OTG controller is disabled after RESET and must be enabled by
writing a 1 to the PCUSB bit in the PCONP register, see
This section describes the clocking and power management features of the USB Device
Controller.
Name
V
USB_CONNECT1,
USB_CONNECT2
USB_UP_LED1,
USB_UP_LED2
USB_D+1, USB_D+2
USB_D − 1, USB_D − 2
BUS
for details.
Rev. 04 — 26 August 2009
Section 13–13 “Slave mode operation”
Section 15–6.3 “Connecting USB as one port host and one port
Direction
I
O
O
I/O
I/O
for a detailed description of this mode.
Description
V
via its corresponding PINSEL register, it is driven
HIGH internally.
SoftConnect control signal.
GoodLink LED control signal.
Positive differential data.
Negative differential data.
Chapter 13: LPC24XX USB device controller
BUS
status input. When this function is not enabled
Table
for a detailed description of
4–63.
C110)”).
UM10237
© NXP B.V. 2009. All rights reserved.
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