LPC1810FET100,551 NXP Semiconductors, LPC1810FET100,551 Datasheet - Page 681
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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27.7.1.1 Quadrature input signals
27.7.1 Input signals
The QEI module supports two modes of signal operation: quadrature phase mode and
clock/direction mode. In quadrature phase mode, the encoder produces two clocks that
are 90 degrees out of phase; the edge relationship is used to determine the direction of
rotation. In clock/direction mode, the encoder produces a clock signal to indicate steps
and a direction signal to indicate the direction of rotation.).
This mode is determined by the SigMode bit of the QEI Control (CON) register (See
Table
pin functions as the direction signal and PhB pin functions as the clock signal for the
counters, etc. When the SigMode bit = 0, the PhA pin and PhB pins are decoded by the
quadrature decoder. In this mode the quadrature decoder produces the direction and
clock signals for the counters, etc. In both modes the direction signal is subject to the
effects of the direction invert (DIRINV) bit.
When edges on PhA lead edges on PhB, the position counter is incremented. When
edges on PhB lead edges on PhA, the position counter is decremented. When a rising
and falling edge pair is seen on one of the phases without any edges on the other, the
direction of rotation has changed.
Table 602. Encoder states
Table 603. Encoder state transitions
[1]
Interchanging of the PhA and PhB input signals are compensated by complementing the
DIR bit. When set = 1, the direction inversion bit (DIRINV) complements the DIR bit.
Phase A
1
1
0
0
from state
1
2
3
4
4
3
2
1
All other state transitions are illegal and should set the ERR bit.
575). When the SigMode bit = 1, the quadrature decoder is bypassed and the PhA
All information provided in this document is subject to legal disclaimers.
Rev. 00.13 — 20 July 2011
Chapter 27: LPC18xx Quadrature Encoder Interface (QEI)
Phase B
0
1
1
0
to state
2
3
4
1
3
2
1
4
[1]
Direction
positive
negative
state
1
2
3
4
UM10430
© NXP B.V. 2011. All rights reserved.
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