LPC2458FET180,551 NXP Semiconductors, LPC2458FET180,551 Datasheet - Page 662
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
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LPC2458FET180,551
Manufacturer:
MICROCHIP
Quantity:
1 103
Company:
Part Number:
LPC2458FET180,551
Manufacturer:
NXP Semiconductors
Quantity:
10 000
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1. Features
2. Applications
3. Description
UM10237_4
User manual
The purpose of the Watchdog is to reset the microcontroller within a reasonable amount of
time if it enters an erroneous state. When enabled, the Watchdog will generate a system
reset if the user program fails to "feed" (or reload) the Watchdog within a predetermined
amount of time.
For interaction of the on-chip watchdog and other peripherals, especially the reset and
boot-up procedures, please read
The Watchdog consists of a divide by 4 fixed pre-scaler and a 32 bit counter. The clock is
fed to the timer via a pre-scaler. The timer decrements when clocked. The minimum value
from which the counter decrements is 0xFF. Setting a value lower than 0xFF causes 0xFF
to be loaded in the counter. Hence the minimum Watchdog interval is (T
and the maximum Watchdog interval is (T
The Watchdog should be used in the following manner:
•
•
•
•
•
•
•
•
•
•
•
•
UM10237
Chapter 27: LPC24XX WatchDog Timer (WDT)
Rev. 04 — 26 August 2009
Internally resets chip if not periodically reloaded.
Debug mode.
Enabled by software but requires a hardware reset or a Watchdog reset/interrupt to be
disabled.
Incorrect/Incomplete feed sequence causes reset/interrupt if enabled.
Flag to indicate Watchdog reset.
Programmable 32 bit timer with internal pre-scaler.
Selectable time period from (T
T
The Watchdog clock (WDCLK) source can be selected from the RTC clock, the
Internal RC oscillator (IRC), or the APB peripheral clock (PCLK, see
gives a wide range of potential timing choices for Watchdog operation under different
power reduction conditions. It also provides the ability to run the Watchdog timer from
an entirely internal source that is not dependent on an external crystal and its
associated components and wiring, for increased reliability.
Set the Watchdog timer constant reload value in WDTC register.
Setup mode in WDMOD register.
Enable the Watchdog by writing 0xAA followed by 0x55 to the WDFEED register.
Watchdog should be fed again before the Watchdog counter underflows to prevent
reset/interrupt.
WDCLK
× 4.
Rev. 04 — 26 August 2009
Section 3–3.2 “Reset” on page 31
WDCLK
× 256 × 4) to (T
WDCLK
× 2
32
× 4) in multiples of (T
WDCLK
× 2
32
of this document.
× 4) in multiples of
© NXP B.V. 2009. All rights reserved.
Table
WDCLK
User manual
WDCLK
4–56). This
× 256 × 4)
662 of 792
× 4).
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