LPC1342FHN33,551 NXP Semiconductors, LPC1342FHN33,551 Datasheet - Page 152

• Manufacturer Part Number: LPC1342FHN33,551
• Description: IC MCU 32BIT 16KB FLASH 33HVQFN
• Manufacturer: NXP Semiconductors
• Series: LPC13xxr

Specifications of LPC1342FHN33,551

• Program Memory Type: FLASH
• Program Memory Size: 16KB (16K x 8)
• Package / Case: 33-VQFN Exposed Pad, 33-HVQFN, 33-SQFN, 33-DHVQFN
• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 72MHz
• Connectivity: I²C, Microwire, SPI, SSI, SSP, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 28
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: LPC13
• Core: ARM Cortex M3
• Data Bus Width: 32 bit
• Data Ram Size: 4 KB
• Interface Type: I2C, UART
• Maximum Clock Frequency: 72 MHz
• Number Of Programmable I/os: 28
• 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
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Package: 33HVQFN EP
• Device Core: ARM Cortex M3
• Family Name: LPC1000
• Maximum Speed: 72 MHz
• 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: 568-4946; 935289656551

NXP Semiconductors
UM10375
User manual
9.14.2 Isochronous endpoints
10. Software has no more packets to send, so it simply clears the interrupt.
11. Both B_1 and B_2 are empty, and the active buffer is B_2. The next packet written by
For isochronous endpoints, the active data buffer is switched by hardware when the
FRAME interrupt occurs. The SIE Clear Buffer and Validate Buffer commands do not
cause the active buffer to be switched.
Double-buffering allows the software to make full use of the frame interval writing or
reading a packet to or from the active buffer, while the packet in the other buffer is being
sent or received on the bus.
For an OUT isochronous endpoint, any data not read from the active buffer before the end
of the frame is lost when it switches.
For an IN isochronous endpoint, if the active buffer is not validated before the end of the
frame, an empty packet is sent on the bus when the active buffer is switched, and its
contents will be overwritten when it becomes active again.
9. The device successfully sends the third packet from B_1 and generates an endpoint
interrupt.
software will go into B_2.
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 7 July 2010
Chapter 9: LPC13xx USB device controller
UM10375
© NXP B.V. 2010. All rights reserved.
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