LPC1857FET256,551 NXP Semiconductors, LPC1857FET256,551 Datasheet - Page 633
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
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LPC1857FET256,551
Manufacturer:
NXP Semiconductors
Quantity:
10 000
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25.8 Example timer operation
25.9 Architecture
<Document ID>
User manual
Fig 70. A timer cycle in which PR=2, MRx=6, and both interrupt and reset on match are enabled.
Fig 71. A timer Cycle in Which PR=2, MRx=6, and both interrupt and stop on match are enabled
prescale counter
timer counter
(counter enable)
timer counter
prescale
interrupt
counter
counter
PCLK
timer
reset
interrupt
TCR[0]
PCLK
Figure 70
The prescaler is set to 2 and the match register set to 6. At the end of the timer cycle
where the match occurs, the timer count is reset. This gives a full length cycle to the
match value. The interrupt indicating that a match occurred is generated in the next clock
after the timer reached the match value.
Figure 71
prescaler is again set to 2 and the match register set to 6. In the next clock after the timer
reaches the match value, the timer enable bit in TCR is cleared, and the interrupt
indicating that a match occurred is generated.
The block diagram for TIMER/COUNTER0 and TIMER/COUNTER1 is shown in
Figure
4
2
4
2
72.
shows a timer configured to reset the count and generate an interrupt on match.
shows a timer configured to stop and generate an interrupt on match. The
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All information provided in this document is subject to legal disclaimers.
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Rev. 00.13 — 20 July 2011
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Chapter 25: LPC18xx Timer0/1/2/3
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© NXP B.V. 2011. All rights reserved.
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