Datasheet
LPC408X_7X All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 3.1 — 1 September 2014 56 of 138
NXP Semiconductors
LPC408x/7x
32-bit ARM Cortex-M4 microcontroller
7.11.1 Features
• Dynamic memory interface support including single data rate SDRAM.
• Asynchronous static memory device support including RAM, ROM, and flash, with or
without asynchronous page mode.
• Low transaction latency.
• Read and write buffers to reduce latency and to improve performance.
• 8/16/32 data and 16/20/26 address lines wide static memory support.
• 16 bit and 32 bit wide chip select SDRAM memory support.
• Static memory features include:
– Asynchronous page mode read.
– Programmable Wait States.
– Bus turnaround delay.
– Output enable and write enable delays.
– Extended wait.
• Four chip selects for synchronous memory and four chip selects for static memory
devices.
• Power-saving modes dynamically control EMC_CKE and EMC_CLK outputs to
SDRAMs.
• Dynamic memory self-refresh mode controlled by software.
• Controller supports 2048 (A0 to A10), 4096 (A0 to A11), and 8192 (A0 to A12) row
address synchronous memory parts. That is typical 512 MB, 256 MB, and 128 MB
parts, with 4, 8, 16, or 32 data bits per device.
• Separate reset domains allow the for auto-refresh through a chip reset if desired.
Note: Synchronous static memory devices (synchronous burst mode) are not supported.
7.12 General purpose DMA controller
The GPDMA is an AMBA AHB compliant peripheral allowing selected peripherals to have
DMA support.
The GPDMA enables peripheral-to-memory, memory-to-peripheral,
peripheral-to-peripheral, and memory-to-memory transactions. The source and
destination areas can each be either a memory region or a peripheral and can be
accessed through the AHB master. The GPDMA controller allows data transfers between
the various on-chip SRAM areas and supports the SD/MMC card interface, all SSPs, the
I
2
S, all UARTs, the A/D Converter, and the D/A Converter peripherals. DMA can also be
triggered by selected timer match conditions. Memory-to-memory transfers and transfers
to or from GPIO are supported.
7.12.1 Features
• Eight DMA channels. Each channel can support an unidirectional transfer.
• 16 DMA request lines.