LPC2420FBD208,551 NXP Semiconductors, LPC2420FBD208,551 Datasheet - Page 70

• Manufacturer Part Number: LPC2420FBD208,551
• Description: IC ARM7 MCU ROMLESS 208LQFP
• Manufacturer: NXP Semiconductors
• Series: LPC2400r

Specifications of LPC2420FBD208,551

• Program Memory Type: ROMless
• Package / Case: 208-LQFP
• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 72MHz
• Connectivity: EBI/EMI, 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: 82K 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: 82 KB
• Interface Type: CAN/I2C/I2S/SPI/SSP/UART/USB
• Maximum Clock Frequency: 72 MHz
• Number Of Programmable I/os: 160
• Number Of Timers: 4
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2
• 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
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-4527; 935286745551

NXP Semiconductors
LPC2420_60_5
Preliminary data sheet
Fig 26. Booting from two 8-bit memory chips
13.3 XTAL and RTC Printed Circuit Board (PCB) layout guidelines
13.4 Suggested boot memory interface solutions
A[a_b:1]
The crystal should be connected on the PCB as close as possible to the oscillator input
and output pins of the chip. Take care that the load capacitors C
case of third overtone crystal usage, have a common ground plane. The external
components must also be connected to the ground plain. Loops must be made as small
as possible, in order to keep the noise coupled in via the PCB as small as possible. Also
parasitics should stay as small as possible. Values of C
smaller accordingly to the increase in parasitics of the PCB layout.
‘a_m’ and ‘a_b’ in the following figures refer to the highest order address line of the
memory chip and the highest order microcontroller’s address line used respectively.
CS1
Fig 25. Slave mode operation of the on-chip oscillator
OE
D[15:8]
BLS1
A[a_m:0]
IO[7:0]
WE
OE
CE
Rev. 05 — 24 February 2010
MEMORY
8-bit
XTAL1
LPC2xxx
C i
100 pF
D[7:0]
BLS0
002aae718
Flashless 16-bit/32-bit microcontroller
C g
A[a_m:0]
IO[7:0]
WE
CE
OE
x1
and C
LPC2420/2460
MEMORY
8-bit
002aad322
x2
x1
should be chosen
and C
© NXP B.V. 2010. All rights reserved.
x2
, and C
x3
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in