LPC1769FBD100,551 NXP Semiconductors, LPC1769FBD100,551 Datasheet - Page 571

• Manufacturer Part Number: LPC1769FBD100,551
• Description: IC ARM CORTEX MCU 512K 100-LQFP
• Manufacturer: NXP Semiconductors
• Series: LPC17xxr

Specifications of LPC1769FBD100,551

• Program Memory Type: FLASH
• Program Memory Size: 512KB (512K x 8)
• Package / Case: 100-LQFP
• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 120MHz
• Connectivity: CAN, Ethernet, I²C, IrDA, Microwire, SPI, SSI, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, DMA, I²S, Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 70
• Ram Size: 64K x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 3.6 V
• Data Converters: A/D 8x12b, D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: LPC17
• Core: ARM Cortex M3
• Data Bus Width: 32 bit
• Data Ram Size: 64 KB
• Interface Type: Ethernet, USB, OTG, CAN
• Maximum Clock Frequency: 120 MHz
• Number Of Programmable I/os: 70
• 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, MCB1760, MCB1760U, MCB1760UME
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 8 Channel
• On-chip Dac: 10 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 622-1005 - USB IN-CIRCUIT PROG ARM7 LPC2K
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-4966; 935290522551

NXP Semiconductors
Table 523: Watchdog Mode register (WDMOD - address 0x4000 0000) bit description
Table 524. Watchdog operating modes selection
UM10360
User manual
Bit
0
1
2
3
31:4
WDEN
0
1
1
Symbol
WDEN
WDRESET WDRESET Watchdog reset enable bit (set -only). When 1, a watchdog timeout will
WDTOF
WDINT
-
WDRESET
X (0 or 1)
0
1
28.4.1 Watchdog Mode register (WDMOD - 0x4000 0000)
Description
WDEN Watchdog enable bit (set-only). When 1, the watchdog timer is running.
cause a chip reset.
WDTOF Watchdog time-out flag. Set when the watchdog timer times out, cleared by
software.
WDINT Watchdog interrupt flag (read-only, not clearable by software).
Reserved, user software should not write ones to reserved bits. The value read from a
reserved bit is not defined.
The WDMOD register controls the operation of the Watchdog as per the combination of
WDEN and RESET bits. Note that a watchdog feed must be performed before any
changes to the WDMOD register take effect.
Once the WDEN and/or WDRESET bits are set they can not be cleared by software. Both
flags are cleared by an external reset or a Watchdog timer underflow.
WDTOF The Watchdog time-out flag is set when the Watchdog times out. This flag is
cleared by software.
WDINT The Watchdog interrupt flag is set when the Watchdog times out. This flag is
cleared when any reset occurs. Once the watchdog interrupt is serviced, it can be
disabled in the NVIC or the watchdog interrupt request will be generated indefinitely. the
intent of the watchdog interrupt is to allow debugging watchdog activity without resetting
the device when the watchdog overflows.
Watchdog reset or interrupt will occur any time the watchdog is running and has an
operating clock source. Any clock source works in Sleep mode, and the IRC works in
Deep Sleep mode. If a watchdog interrupt occurs in Sleep or Deep Sleep mode, it will
wake up the device.
Mode of Operation
Debug/Operate without the Watchdog running.
Watchdog interrupt mode: debug with the Watchdog interrupt but no WDRESET enabled.
When this mode is selected, a watchdog counter underflow will set the WDINT flag and the
Watchdog interrupt request will be generated.
Watchdog reset mode: operate with the Watchdog interrupt and WDRESET enabled.
When this mode is selected, a watchdog counter underflow will reset the microcontroller. Although
the Watchdog interrupt is also enabled in this case (WDEN = 1) it will not be recognized since the
watchdog reset will clear the WDINT flag.
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 19 August 2010
Chapter 28: LPC17xx Watchdog Timer (WDT)
UM10360
© NXP B.V. 2010. All rights reserved.
Reset Value
0
0
0 (Only after
external reset)
0
NA
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