EA-QSB-015 Embedded Artists, EA-QSB-015 Datasheet - Page 16

• Manufacturer Part Number: EA-QSB-015
• Description: Development Boards & Kits - ARM QUICK START BOARD LPC11U35
• Manufacturer: Embedded Artists

Specifications of EA-QSB-015

• Rohs: yes
• Product: Development Kits
• Tool Is For Evaluation Of: LPC11U35
• Core: ARM Cortex M0
• Interface Type: USB
• Operating Supply Voltage: 3.3 V

Copyright 2012 © Embedded Artists AB
LPC11U35 QuickStart Board - User’s Guide
It is also possible to use the (physically) bigger 2x10 pos, 100 mil pitch ARM SWD/JTAG interface.
Embedded Artists has an adapter for the purpose, see Figure 5 below. Note that the SWD/JTAG
debug interface must support the SWD protocol in order to work.
Figure 5 – SWD/JTAG Adapter
5.2
The LPC11U35 supports In-System Programming (ISP) mode, which is easily activated. In this mode it
is possible to download (and program into flash memory) new program images. The LPC11U35
sample the state of the PIO0_1 pin immediately after a reset. If the pin is low, the ISP mode is
activated. By pressing the bootload push-button, SW2, pin PIO0_1 is pulled low. ISP mode is activated
this way:
The sequence of steps can be done quickly. The minimum time between step 2 and 3 is in the region
of 200mS (which is the reset pulse minimum time from U3 plus the time until the LPC11U35 samples
the PIO0_1 pin).
There are two different ISP modes. Which one gets activated depends on the PIO0_3 pin:
For more information about the ISP mode, read the LPC11U35 User’s Manual [2] from NXP.
5.2.1
USP-ISP mode is supported through enumeration as a Mass Storage Class Device, i.e., it is possible
to drag and drop a binary file to the drive associated with the LPC11U35.
This section describes how you generate the binary file, adds the necessary checksum to the binary
file and downloads the file to the LPC11U35 QuickStart Board.
The steps necessary to download an image (i.e., the application program) are described below:


1. Press both the bootload push-button (SW2) and the reset push-button (SW1). See Figure 2
2. Release the reset push-button while keeping the bootload push-button pressed.
3. Then finally release the bootload push-button. The LPC11U35 is now in ISP mode.
Activate LPC11U35 ISP Mode
USB-ISP mode is active if pin PIO0_3 is sampled high immediately after reset. Pin PIO0_3 is
the USB-VBUS pin so this pin is high if the USB interface is connected to a USB Host (for
example a PC).
UART-ISP mode is active if pin PIO0_3 is sampled low immediately after reset. Note that this
pin must be externally pulled to ground in order to activate this mode. The on-board resistor
R6 (2Kohm) will always pull this pin high unless pulled low externally.
on page 13 for details about where to find the two push-buttons.
USB-ISP Mode
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