LPC1810FET100,551 NXP Semiconductors, LPC1810FET100,551 Datasheet - Page 762
LPC1810FET100,551
Manufacturer Part Number
LPC1810FET100,551
Description
IC MCU 32BIT 136KB FLSH 100TFBGA
Manufacturer
NXP Semiconductors
Series
LPC18xxr
Datasheets
1.LPC1830FET256551.pdf
(87 pages)
2.LPC1810FET100551.pdf
(2 pages)
3.LPC1810FET100551.pdf
(1164 pages)
Specifications of LPC1810FET100,551
Core Processor
ARM® Cortex-M3™
Core Size
32-Bit
Speed
150MHz
Connectivity
CAN, EBI/EMI, I²C, Microwire, SPI, SSI, SSP, UART/USART
Peripherals
Brown-out Detect/Reset, DMA, I²S, Motor Control PWM, POR, PWM, WDT
Number Of I /o
64
Program Memory Size
-
Program Memory Type
ROMless
Eeprom Size
-
Ram Size
136K x 8
Voltage - Supply (vcc/vdd)
2 V ~ 3.6 V
Data Converters
A/D 12x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-TFBGA
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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User manual
33.5.16.1 Baud rate calculation
Table 705: UART1 Fractional Divider Register (FDR - address 0x4008 2028) bit description
This register controls the clock pre-scaler for the baud rate generation. The reset value of
the register keeps the fractional capabilities of UART1 disabled making sure that UART1
is fully software and hardware compatible with UARTs not equipped with this feature.
UART1 baud rate can be calculated as (n = 1):
Where PCLK is the peripheral clock, U1DLM and U1DLL are the standard UART1 baud
rate divider registers, and DIVADDVAL and MULVAL are UART1 fractional baud rate
generator specific parameters.
The value of MULVAL and DIVADDVAL should comply to the following conditions:
The value of the U1FDR should not be modified while transmitting/receiving data or data
may be lost or corrupted.
If the U1FDR register value does not comply to these two requests, then the fractional
divider output is undefined. If DIVADDVAL is zero then the fractional divider is disabled,
and the clock will not be divided.
UART1 can operate with or without using the Fractional Divider. In real-life applications it
is likely that the desired baud rate can be achieved using several different Fractional
Divider settings. The following algorithm illustrates one way of finding a set of DLM, DLL,
MULVAL, and DIVADDVAL values. Such set of parameters yields a baud rate with a
relative error of less than 1.1% from the desired one.
Bit
3:0
7:4
31:8
1. 1 MULVAL 15
2. 0 DIVADDVAL 14
3. DIVADDVAL < MULVAL
Function
DIVADDVAL Baud-rate generation pre-scaler divisor value. If this field is 0,
MULVAL
-
UART1
All information provided in this document is subject to legal disclaimers.
baudrate
Description
fractional baud-rate generator will not impact the UARTn
baudrate.
Baud-rate pre-scaler multiplier value. This field must be
greater or equal 1 for UARTn to operate properly, regardless
of whether the fractional baud-rate generator is used or not.
Reserved, user software should not write ones to reserved
bits. The value read from a reserved bit is not defined.
Rev. 00.13 — 20 July 2011
=
----------------------------------------------------------------------------------------------------------------------------------
16
256
U1DLM
+
PCLK
U1DLL
Chapter 33: LPC18xx UART1
1
+
DivAddVal
---------------------------- -
MulVal
UM10430
© NXP B.V. 2011. All rights reserved.
Reset value
0
1
0
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