LPC1769FBD100,551 NXP Semiconductors, LPC1769FBD100,551 Datasheet - Page 266
LPC1769FBD100,551
Manufacturer Part Number
LPC1769FBD100,551
Description
IC ARM CORTEX MCU 512K 100-LQFP
Manufacturer
NXP Semiconductors
Series
LPC17xxr
Datasheets
1.OM11043.pdf
(79 pages)
2.LPC1767FBD100551.pdf
(2 pages)
3.LPC1767FBD100551.pdf
(840 pages)
4.LPC1769FBD100551.pdf
(66 pages)
Specifications of LPC1769FBD100,551
Program Memory Type
FLASH
Program Memory Size
512KB (512K x 8)
Package / Case
100-LQFP
Core Processor
ARM® Cortex-M3™
Core Size
32-Bit
Speed
120MHz
Connectivity
CAN, Ethernet, I²C, IrDA, Microwire, SPI, SSI, UART/USART, USB OTG
Peripherals
Brown-out Detect/Reset, DMA, I²S, Motor Control PWM, POR, PWM, WDT
Number Of I /o
70
Ram Size
64K x 8
Voltage - Supply (vcc/vdd)
2.4 V ~ 3.6 V
Data Converters
A/D 8x12b, D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
LPC17
Core
ARM Cortex M3
Data Bus Width
32 bit
Data Ram Size
64 KB
Interface Type
Ethernet, USB, OTG, CAN
Maximum Clock Frequency
120 MHz
Number Of Programmable I/os
70
Number Of Timers
4
Operating Supply Voltage
3.3 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
MDK-ARM, RL-ARM, ULINK2, MCB1760, MCB1760U, MCB1760UME
Minimum Operating Temperature
- 40 C
On-chip Adc
12 bit, 8 Channel
On-chip Dac
10 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
568-4966
935290522551
935290522551
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LPC1769FBD100,551
Manufacturer:
NXP Semiconductors
Quantity:
10 000
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NXP Semiconductors
11.16 Double buffered endpoint operation
UM10360
User manual
11.15.7.4 Ending the packet transfer
11.16.1 Bulk endpoints
The DMA engine proceeds with the transfer until the number of bytes specified in the field
DMA_buffer_length is transferred to or from on-chip RAM. Then the EOT interrupt will be
generated. If this happens in the middle of the packet, the linked DD will get loaded and
the remaining part of the packet gets transferred to or from the address pointed by the
new DD.
OUT endpoints
If the linked DD is not valid and the packet is partially transferred to memory, the DD ends
with DataOverrun status code set, and the DMA will be disabled for this endpoint.
Otherwise DD_status will be updated with the NormalCompletion status code.
IN endpoints
If the linked DD is not valid and the packet is partially transferred to USB, the DD ends
with a status code of NormalCompletion in the DD_status field. This situation corresponds
to the end of the USB transfer, and the packet will be sent as a short packet. Also, when
the linked DD is valid and buffer length is 0, an empty packet will be sent to indicate the
end of the USB transfer.
The Bulk and Isochronous endpoints of the USB Device Controller are double buffered to
increase data throughput.
When a double-buffered endpoint is realized, enough space for both endpoint buffers is
automatically allocated in the EP_RAM. See
For the following discussion, the endpoint buffer currently accessible to the CPU or DMA
engine for reading or writing is said to be the active buffer.
For Bulk endpoints, the active endpoint buffer is switched by the SIE Clear Buffer or
Validate Buffer commands.
The following example illustrates how double buffering works for a Bulk OUT endpoint in
Slave mode:
Assume that both buffer 1 (B_1) and buffer 2 (B_2) are empty, and that the active buffer is
B_1.
1. The host sends a data packet to the endpoint. The device hardware puts the packet
2. Software clears the endpoint interrupt and begins reading the packet data from B_1.
3. Software is still reading from B_1 when the host attempts to send a third packet. Since
4. Software finishes reading the first packet from B_1 and sends a SIE Clear Buffer
into B_1, and generates an endpoint interrupt.
While B_1 is still being read, the host sends a second packet, which device hardware
places in B_2, and generates an endpoint interrupt.
both B_1 and B_2 are full, the device hardware responds with a NAK.
command to free B_1 to receive another packet. B_2 becomes the active buffer.
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 19 August 2010
Chapter 11: LPC17xx USB device controller
Section
11.10.4.1.
UM10360
© NXP B.V. 2010. All rights reserved.
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