LPC2468FBD208,551 NXP Semiconductors, LPC2468FBD208,551 Datasheet - Page 717

• Manufacturer Part Number: LPC2468FBD208,551
• Description: IC ARM7 MCU FLASH 512K 208-LQFP
• Manufacturer: NXP Semiconductors
• Series: LPC2400r

Specifications of LPC2468FBD208,551

• Program Memory Type: FLASH
• Program Memory Size: 512KB (512K x 8)
• Package / Case: 208-LQFP
• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 72MHz
• Connectivity: CAN, EBI/EMI, Ethernet, I²C, Microwire, MMC, SPI, SSI, SSP, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
• Number Of I /o: 160
• Ram Size: 98K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: LPC24
• Core: ARM7TDMI-S
• Data Bus Width: 16 bit, 32 bit
• Data Ram Size: 98 KB
• Interface Type: CAN/I2S/ISP/SSP/UART/USB
• Maximum Clock Frequency: 72 MHz
• Number Of Programmable I/os: 160
• Number Of Timers: 6
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2, IRD-LPC2468-DEV, SAB-TFBGA208, KSK-LPC2468-PL
• Development Tools By Supplier: OM10100
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 10-bit
• On-chip Dac: 1-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 622-1025 - KIT DEV IND REF DESIGN LPC2468622-1024 - BOARD SCKT ADAPTER FOR TFBGA208568-4358 - DISPLAY QVGA TFT FOR OM10100568-4309 - BOARD EXTENSION LPCSTICK568-4308 - EVAL LPC-STICK WITH LPC2468MCB2400U - BOARD EVAL MCB2400 + ULINK2MCB2400 - BOARD EVAL FOR NXP LPC246X SER622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-4261; 935282457551; LPC2468FBD208-S

NXP Semiconductors
UM10237_4
User manual
4.2.10 Channel hardware
4.2.12 Interrupt generation
4.2.13 The completion of the DMA transfer indication
4.2.11 DMA request priority
4.3 DMA system connections
Each stream is supported by a dedicated hardware channel, including source and
destination controllers, and a FIFO. This enables better latency than a DMA controller with
only a single hardware channel shared between several DMA streams and simplifies the
control logic.
DMA channel priority is fixed. DMA channel 0 has the highest priority and DMA channel 1
has the lowest priority.
If the GPDMA is transferring data for the lower priority channel and then the higher priority
channel goes active, it completes the number of transfers delegated to the master
interface by the lower priority channel before switching over to transfer data for the higher
priority channel. In the worst case this is as large as a one quadword. Channel 1 in the
GPDMA is designed so that it cannot saturate the AHB bus. If it goes active, the GPDMA
relinquishes control of the bus (for a bus cycle), after four transfers of the programmed
size (irrespective of the size of transfer). This enables other AHB masters to access the
bus.
It is recommended that memory-to-memory transactions use the low priority channel.
Otherwise other (lower priority) AHB bus masters are prevented from accessing the bus
during GPDMA memory-to-memory transfer.
A combined interrupt output is generated as an OR function of the individual interrupt
requests of the GPDMA, and is connected to the LPC2400 interrupt controller.
The completion of the DMA transfer is indicated by:
According to
Last Word Request Input nor DMA Last Burst Request Input. Therefore there will be no
indication of completion if SSP0, SSP1 and I2S are performing the flow control.
The connection of the GPDMA to the supported peripheral devices depends on the DMA
functions implemented in those peripherals.
numbers used by the supported peripherals.
Table 651. DMA Connections
Peripheral Function DMA Single
SSP0 Tx
SSP0 Rx
SSP1 Tx
1. The transfer count reaching 0 if the GPDMA is performing flow control, OR
2. The peripheral setting the DMA Last Word Request Input (DMACLSREQ) or the DMA
Last Burst Request Input (DMALBREQ) if the peripheral is performing flow control.
Table 32–651 “DMA
Chapter 32: LPC24XX General Purpose DMA (GPDMA) controller
Request Input
0
1
2
Rev. 04 — 26 August 2009
Connections”, SSP0, SSP1 and I2S do not use DMA
DMA Burst
Request Input
0
1
2
Table 32–651
DMA Last Word
Request Input
-
-
-
shows the DMA Request
UM10237
© NXP B.V. 2009. All rights reserved.
DMA Last Burst
Request Input
-
-
-
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