LPC1837FET256,551 NXP Semiconductors, LPC1837FET256,551 Datasheet - Page 346

• Manufacturer Part Number: LPC1837FET256,551
• Description: Microcontrollers (MCU) 32BIT ARM CORTEX-M3 MCU 136KB SRAM
• Manufacturer: NXP Semiconductors
• Series: LPC18xxr

Specifications of LPC1837FET256,551

• Core: ARM Cortex M3
• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 150MHz
• Connectivity: CAN, EBI/EMI, Ethernet, I²C, Microwire, SD/MMC, SPI, SSI, SSP, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, DMA, I²S, Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 80
• Program Memory Size: 1MB (1M x 8)
• Program Memory Type: FLASH
• Eeprom Size: -
• Ram Size: 136K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 3.6 V
• Data Converters: A/D 16x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 256-LBGA
• Lead Free Status / Rohs Status: Details
• Other names: 935293795551

NXP Semiconductors
19.8 Functional description
<Document ID>
User manual
Fig 30. EMC block diagram
19.8.1 AHB slave register interface
Figure 30
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.
•
•
•
•
•
INTERFACE
INTERFACE
AHB SLAVE
AHB SLAVE
REGISTER
MEMORY
AHB slave register interface.
AHB slave memory interfaces.
Data buffers.
Memory controller state machine.
Pad interface.
shows a block diagram of the EMC.
EMC
CONTROLLER
All information provided in this document is subject to legal disclaimers.
BUFFERS
MACHINE
MEMORY
STATE
DATA
Rev. 00.13 — 20 July 2011
Chapter 19: LPC18xx External Memory Controller (EMC)
EXTBUS_A[23:0]
EXTBUS_D[31:0]
EXTBUS_WE
EXTBUS_OE
EXTBUS_BLS[3:0]
EXTBUS_CS[3:0]
EXTBUS_DYCS[3:0]
EXTBUS_CAS
EXTBUS_RAS
EXTBUS_CLK[3:0]
EXTBUS_CKEOUT[3:0]
EXTBUS_DQMOUT[3:0]
shared
signals
static
memory
signals
dynamic
memory
signals
UM10430
© NXP B.V. 2011. All rights reserved.
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