Configuration and Setup
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SPRUIF8 – June 2017
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AM438x ePOS EVM Hardware
When the DIP switch is on, then the corresponding SYSBOOT signal is pulled high. When the DIP switch
is off, then the corresponding SYSBOOT signal is pulled low. See the ePOS EVM schematic for more
details.
5.2
I2C Address Assignments
See the first page of the schematic for I2C device addresses.
5.3
I2C ID Memory
The ePOS EVM has a dedicated I2C EEPROM that contains specific identity and configuration information
for that board (see
Table 5
). In addition, there is available space in each memory for user-specific
configuration information. The part number of the memory device is CAT24C256WI-G.
Table 5. AM438x ePOS EVM EEPROM Data
Name
Size (bytes) Contents
Header
4
MSB 0xEE3355AA LSB
Board name
8
Name for board in ASCII "A33515BB" = AM438x ePOS EVM
Version
4
Hardware version code for board in ASCII "1.4A" = rev. 01.4A
Serial number
12
Serial number of the board.
This is a 12-character string: WWYY4P16nnnn, where:
• WW = 2-digit week of the year of production
• YY = 2-digit year of production
• nnnn = incrementing board number
Configuration
32
Codes to show the configuration setup on this board. For the available EVMs
supported, the following codes are used:
• ASCII "SKU#01" = base board for general purpose EVM
• ASCII "SKU#02" = base board for industrial motor control EVM
• Remaining 26 bytes are reserved
Ethernet MAC address #0
6
MAC address for AM438x Ethernet MAC #1
Ethernet MAC address #1
6
MAC address for AM438x Ethernet MAC #2 or PRU #0
Ethernet MAC address #2
6
MAC address for AM438x PRU #1 (if used)
Available
32702
Available space for other nonvolatile codes and data
5.4
JTAG
The AM438x ePOS EVM supports embedded XDS100V2 USB emulation using the microAB connector.
One of the FT2232 ports is used to covert these JTAG signals to USB and the other port is used for UART
signals. The ePOS EVM also has an optional 20-pin CJTAG connector from TI, to support the emulation.
Other JTAG adapters are available on TI's website and can be purchased
here
.