LPC1857FET256,551 NXP Semiconductors, LPC1857FET256,551 Datasheet - Page 848
LPC1857FET256,551
Manufacturer Part Number
LPC1857FET256,551
Description
IC MCU 32BIT 1MB FLASH 256LBGA
Manufacturer
NXP Semiconductors
Series
LPC18xxr
Datasheets
1.LPC1830FET256551.pdf
(87 pages)
2.LPC1810FET100551.pdf
(2 pages)
3.LPC1810FET100551.pdf
(1164 pages)
Specifications of LPC1857FET256,551
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, LCD, 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
Lead free / RoHS Compliant
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LPC1857FET256,551
Manufacturer:
NXP Semiconductors
Quantity:
10 000
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36.7.3.10.1 Reception of messages with FIFO buffers
36.7.3.10.2 Reading from a FIFO buffer
36.7.3.10 Configuration of a FIFO buffer
With the exception of the EOB bit, the configuration of Receive Objects belonging to a
FIFO Buffer is the same as the configuration of a (single) Receive Object, see section
Section
To concatenate two or more Message Objects into a FIFO Buffer, the identifiers and
masks (if used) of these Message Objects have to be programmed to matching values.
Due to the implicit priority of the Message Objects, the Message Object with the lowest
number will be the first Message Object of the FIFO Buffer. The EOB bit of all Message
Objects of a FIFO Buffer except the last have to be programmed to zero. The EOB bits of
the last Message Object of a FIFO Buffer is set to one, configuring it as the End of the
Block.
Received messages with identifiers matching to a FIFO Buffer are stored into a Message
Object of this FIFO Buffer starting with the Message Object with the lowest message
number.
When a message is stored into a Message Object of a FIFO Buffer the NEWDAT bit of this
Message Object is set. By setting NEWDAT while EOB is zero the Message Object is
locked for further write accesses by the Message Handler until the CPU has written the
NEWDAT bit back to zero.
Messages are stored into a FIFO Buffer until the last Message Object of this FIFO Buffer
is reached. If none of the preceding Message Objects is released by writing NEWDAT to
zero, all further messages for this FIFO Buffer will be written into the last Message Object
of the FIFO Buffer and therefore overwrite previous messages.
When the CPU transfers the contents of Message Object to the IFx Message Buffer
registers by writing its number to the IFx Command Request Register, bits NEWDAT and
INTPND in the corresponding Command Mask Register should be reset to zero
(TXRQST/NEWDAT = ‘1’ and ClrINTPND = ‘1’). The values of these bits in the Message
Control Register always reflect the status before resetting the bits.
To assure the correct function of a FIFO Buffer, the CPU should read out the Message
Objects starting at the FIFO Object with the lowest message number.
36.7.3.8.
All information provided in this document is subject to legal disclaimers.
Rev. 00.13 — 20 July 2011
Chapter 36: LPC18xx C_CAN
UM10430
© NXP B.V. 2011. All rights reserved.
848 of 1164
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