LPC1769FBD100,551 NXP Semiconductors, LPC1769FBD100,551 Datasheet - Page 24

• 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
UM10360
User manual
3.6.1 Register description
3.6.2 External Interrupt flag register (EXTINT - 0x400F C140)
The external interrupt function has four registers associated with it. The EXTINT register
contains the interrupt flags. The EXTMODE and EXTPOLAR registers specify the level
and edge sensitivity parameters.
Table 9.
[1]
When a pin is selected for its external interrupt function, the level or edge on that pin
(selected by its bits in the EXTPOLAR and EXTMODE registers) will set its interrupt flag in
this register. This asserts the corresponding interrupt request to the NVIC, which will
cause an interrupt if interrupts from the pin are enabled.
Writing ones to bits EINT0 through EINT3 in EXTINT register clears the corresponding
bits. In level-sensitive mode the interrupt is cleared only when the pin is in its inactive
state.
Once a bit from EINT0 to EINT3 is set and an appropriate code starts to execute (handling
wake-up and/or external interrupt), this bit in EXTINT register must be cleared. Otherwise
event that was just triggered by activity on the EINT pin will not be recognized in future.
Important: whenever a change of external interrupt operating mode (i.e. active
level/edge) is performed (including the initialization of an external interrupt), the
corresponding bit in the EXTINT register must be cleared! For details see
Section 3.6.3 “External Interrupt Mode register (EXTMODE - 0x400F C148)”
Section 3.6.4 “External Interrupt Polarity register (EXTPOLAR - 0x400F
For example, if a system wakes up from Power-down using low level on external interrupt
0 pin, its post wake-up code must reset EINT0 bit in order to allow future entry into the
Power-down mode. If EINT0 bit is left set to 1, subsequent attempt(s) to invoke
Power-down mode will fail. The same goes for external interrupt handling.
More details on Power-down mode will be discussed in the following chapters.
Name
EXTINT
EXTMODE
EXTPOLAR The External Interrupt Polarity Register controls
Reset Value reflects the data stored in used bits only. It does not include reserved bits content.
External Interrupt registers
Description
The External Interrupt Flag Register contains
interrupt flags for EINT0, EINT1, EINT2 and
EINT3. See
The External Interrupt Mode Register controls
whether each pin is edge- or level-sensitive.
See
which level or edge on each pin will cause an
interrupt. See
All information provided in this document is subject to legal disclaimers.
Table
Rev. 2 — 19 August 2010
11.
Table
Table
10.
12.
Chapter 3: LPC17xx System control
Access
R/W
R/W
R/W
Reset
value
0x00
0x00
0x00
UM10360
© NXP B.V. 2010. All rights reserved.
C14C)”.
[1]
Address
0x400F C140
0x400F C148
0x400F C14C
and
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