Product Description

myUpTech AB
DOC_10000030-0
4
HMI
-
L
Internal Power Supply
The HMI-L can handle a supply voltage of 5 VDC using
the micro USB port X5, and 12 VDC or 24 VAC using the 6-
pole connector X1.
Incoming Power and RS 485
Communication and power are connected to X1. The
HMI-L communicates with products over RS485.
Using the switch S1 the HMI-L can be switched ON/OFF or
into an emergency recovery mode depending on what
certified model is being used. Model 10000033 is only
able to be switched ON or OFF, but model 10000070 can
be switched ON, OFF, or into R-N Mode (emergency
recovery mode).
When recovery mode is selected the HMI-L will not
function, but its LEDs will be turned on to their maximum
brightness. A connected board can sense that this mode
has been selected using a pullup resistor and analog
input as seen in the following example.
Flash Memory
For the unit to be updated via IEEE 802.15.4 the new
firmware must be entirely downloaded to the HMI-L then
checked and applied. This is done by storing the
downloaded firmware in a 1Mbyte flash memory chip.
The flash memory chip communicates using SPI.
JTAG Interface
A Segger J-Link needle adapter (8.06.04 J-LINK 10-PIN
NEEDLE ADAPTOR) is used for connecting the
programming device to the HMI-L. It is connected
directly to the PCB in position X6.
X6 JTAG Programming Interface
Pin No. JTAG Signal Name
1 VTref
2 SWDIO/TMS
3 GND
4 SWCLK/TCK
5 +5V
6 SWO/TDO
7 RTCK
8 TDI
9 /TRST
10 SRST
Connector X1 Power Input and RS485
Pin No. Description
1 5VDC, 12VDC, or 24VAC
2 RS485 A
3 RS485 B
4 GND
5 R-N-Mode
6 NC