3
Evaluates: MAXQ Microcontrollers
MAXQ USB-to-JTAG/1-Wire Adapter
Figure 2. MAXQ USB-to-JTAG/1-Wire Adapter Communications Interface
Detailed Description
Note:
In the following sections, software-related items are
identified by bolding. Text in
bold
refers to items directly
from the EV kit software. Text in
bold and underlined
refers
to items from the Windows operating system.
The MAXQ USB-to-JTAG/1-Wire Adapter is designed
to operate as a USB-to-JTAG or USB-to-1-Wire adapter
between programming/debugging tools on the host PC
(such as MAX-IDE, MTK, or IAR Embedded Workbench
M
IDE) and a programmable MAXQ microcontroller. The
MAXQ622 acts as a USB-to-UART converter and allows the
host PC to communicate with the MAXQ622 over a virtual
COM port. The MAXQ622 receives commands and data
from the PC and handles the task of either driving the four
JTAG communication lines (TCK, TMS, TDO, and TDI) or
driving the 1-Wire communication line (
RST
) that connect to
another MAXQ microcontroller on a separate EV kit board.
The adapter has two connectors. The first of these is a
standard mini-B USB connector that is used to connect
the adapter to a USB port on the host PC. The adapter
is powered directly over the USB cable. The second
connector is the standard 10-pin JTAG interface used by
all MAXQ microcontroller EV kits, allowing the adapter to be
connected to another MAXQ microcontroller using a 2x5-pin
header and 10-pin ribbon cable.
The driver software can be downloaded at
www.
maximintegrated.com/evkit
under MAXQUSBJTAGOW
EVKIT Software. Programming and debugging tools can
be found at
www.maximintegrated.com/products/
microcontrollers/development_tools.cfm
.
For more information on the adapter, refer to the
MAXQ
USB-to-JTAG/1-Wire Adapter: User’s Guide
.
IAR Embedded Workbench is a registered trademark of IAR
Systems AB.
EXTERNAL MAXQ
MICROCONTROLLER
(SEPARATE BOARD)
JTAG/1-Wire
INTERFACE
USB
INTERFACE
WINDOWS PC
MAXQ622
MICROCONTROLLER