OM11077 NXP Semiconductors, OM11077 Datasheet - Page 70

• 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
UM10237_4
User manual
Fig 15. EMC block diagram
5.1 AHB slave register interface
The functions of the EMC blocks are described in the following sections:
Note: For 32 bit wide chip selects data is transferred to and from dynamic memory in
SDRAM bursts of four. For 16 bit wide chip selects SDRAM bursts of eight are used.
The AHB slave register interface block enables the registers of the EMC to be
programmed. This module also contains most of the registers and performs the majority of
the register address decoding.
To eliminate the possibility of endianness problems, all data transfers to and from the
registers of the EMC must be 32 bits wide.
Note: If an access is attempted with a size other than a word (32 bits), it causes an
ERROR response to the AHB bus and the transfer is terminated.
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AHB slave register interface.
AHB slave memory interfaces.
Data buffers.
Memory controller state machine.
Pad interface.
INTERFACE
INTERFACE
AHB SLAVE
AHB SLAVE
REGISTER
MEMORY
EMC
CONTROLLER
BUFFERS
MACHINE
MEMORY
STATE
DATA
Rev. 04 — 26 August 2009
Chapter 5: LPC24XX External Memory Controller (EMC)
A[23:0]
D[31:0]
WE
OE
BLS[3:0]
CS[3:0]
DYCS[3:0]
CAS
RAS
CLKOUT[1:0]
CKEOUT[3:0]
DQMOUT[3:0]
shared
signals
static
memory
signals
dynamic
memory
signals
UM10237
© NXP B.V. 2009. All rights reserved.
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