LPC2458FET180,551 NXP Semiconductors, LPC2458FET180,551 Datasheet - Page 658
LPC2458FET180,551
Manufacturer Part Number
LPC2458FET180,551
Description
IC ARM7 MCU FLASH 512K 180TFBGA
Manufacturer
NXP Semiconductors
Series
LPC2400r
Specifications of LPC2458FET180,551
Core Processor
ARM7
Core Size
16/32-Bit
Speed
72MHz
Connectivity
CAN, EBI/EMI, Ethernet, I²C, Microwire, MMC, SPI, SSI, SSP, UART/USART, USB OTG
Peripherals
Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
Number Of I /o
136
Program Memory Size
512KB (512K x 8)
Program Memory Type
FLASH
Ram Size
98K 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
Package / Case
180-TFBGA
Processor Series
LPC24
Core
ARM7TDMI-S
Data Bus Width
32 bit
Data Ram Size
98 KB
Interface Type
CAN, Ethernet, I2C, I2S, IrDA, SPI, SSP, UART, USB
Maximum Clock Frequency
72 MHz
Number Of Programmable I/os
136
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, SAB-TFBGA180
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
On-chip Dac
10 bit, 1 Channel
Package
180TFBGA
Device Core
ARM7TDMI-S
Family Name
LPC2000
Maximum Speed
72 MHz
For Use With
622-1023 - BOARD SCKT ADAPTER FOR TFBGA180622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Other names
568-4258
935282454551
LPC2458FET180-S
935282454551
LPC2458FET180-S
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LPC2458FET180,551
Manufacturer:
MICROCHIP
Quantity:
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Company:
Part Number:
LPC2458FET180,551
Manufacturer:
NXP Semiconductors
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UM10237_4
User manual
6.7.5 Prescaler operation
pulses, this "jitter" could possibly be of concern in an application that wishes to observe
the contents of the Clock Tick Counter (CTC)
Counter Register (CTCR - 0xE002 4004)” on page
The Prescaler block labelled "Combination Logic" in
decrement of the 13 bit PREINT counter is extended by one PCLK. In order to both insert
the correct number of longer cycles, and to distribute them evenly, the combinatorial Logic
associates each bit in PREFRAC with a combination in the 15 bit Fraction Counter. These
associations are shown in the following
For example, if PREFRAC bit 14 is a one (representing the fraction 1/2), then half of the
cycles counted by the 13 bit counter need to be longer. When there is a 1 in the LSB of the
Fraction Counter, the logic causes every alternate count (whenever the LSB of the
Fraction Counter=1) to be extended by one PCLK, evenly distributing the pulse widths.
Similarly, a one in PREFRAC bit 13 (representing the fraction 1/4) will cause every fourth
cycle (whenever the two LSBs of the Fraction Counter = 10) counted by the 13 bit counter
to be longer.
Fig 135. RTC prescaler block diagram
CLK
13 BIT INTEGER COUNTER
13 BIT RELOAD INTEGER
(DOWN COUNTER)
REGISTER
(PREINT)
UNDERFLOW
RELOAD
13
13
Rev. 04 — 26 August 2009
Chapter 26: LPC24XX Real-Time Clock (RTC) and battery RAM
Table
APB bus
extend
reload
directly(Section 26–6.2.2 “Clock Tick
26–582.
651).
to clock tick counter
Figure 26–135
15 BIT FRACTION COUNTER
15 BIT FRACTION REGISTER
COMBINATORIAL LOGIC
(PREFRAC)
15
15
15
determines when the
UM10237
© NXP B.V. 2009. All rights reserved.
CLK
(APB clock)
PCLK
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