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 54 of 138
NXP Semiconductors
LPC408x/7x
32-bit ARM Cortex-M4 microcontroller
7.10 Pin connect block
The pin connect block allows selected pins of the microcontroller to have more than one
function. Configuration registers control the multiplexers to allow connection between the
pin and the on-chip peripherals.
Peripherals should be connected to the appropriate pins prior to being activated and prior
to any related interrupts being enabled. Activity of any enabled peripheral function that is
not mapped to a related pin should be considered undefined.
Most pins can also be configured as open-drain outputs or to have a pull-up, pull-down, or
no resistor enabled.
7.11 External Memory Controller (EMC)
Remark: The EMC is available for parts LPC4088/78/76. Supported memory size and
type and EMC bus width vary for different packages (see Table 2
). The EMC pin
configuration for each part is shown in Table 5
.
The LPC408x/7x EMC is an ARM PrimeCell MultiPort Memory Controller peripheral
offering support for asynchronous static memory devices such as RAM, ROM, and flash.
In addition, it can be used as an interface with off-chip memory-mapped devices and
peripherals. The EMC is an Advanced Microcontroller Bus Architecture (AMBA) compliant
peripheral.
Table 5. External memory controller pin configuration
Parts Data bus pins Address bus
pins
Control pins
SRAM SDRAM
LPC4088FBD208
LPC4088FET208
LPC4078FBD208
LPC4078FET208
EMC_D[31:0] EMC_A[25:0] EMC_BLS[3:0]
,
EMC_CS[3:0],
EMC_OE, EMC_WE
EMC_RAS, EMC_CAS, EMC_DYCS[3:0],
EMC_CLK[1:0], EMC_CKE[3:0],
EMC_DQM[3:0]
LPC4088FET180
LPC4078FET180
LPC4076FET180
EMC_D[15:0] EMC_A[19:0] EMC_BLS[1:0]
,
EMC_CS[1:0],
EMC_OE
, EMC_WE
EMC_RAS, EMC_CAS, EMC_DYCS[1:0],
EMC_CLK[1:0], EMC_CKE[1:0],
EMC_DQM[1:0]
LPC4088FBD144
LPC4078FBD144
LPC4076FBD144
EMC_D[7:0] EMC_A[15:0] EMC_BLS[3:2]
,
EMC_CS[1:0]
,
EMC_OE, EMC_WE
not available