Artesyn COMX-P4080 Installation and Use (August 2014) - Manual (Page 51)

Controls, LEDs, and Connectors
COMX-P4080 COM Express Module Installation and Use (6806800L20C) 51
3.2.3 S1 Switch
COMX-P4080 has a bug which prevents SerDes Bank 1 and SerDes Bank 2 from using the same
reference clock frequency.
For the SerDes configuration options 1, 2, 4, and 6, set sd_refclk1 as 100 MHz and sd_refclk2
as 125 MHz. For configuration options 3 and 5, set sd_refclk1 as 125 MHz and sd_refclk2 as 100
MHz.
Table 3-3 S1 Switch Settings
S1 Bit Function
1 Boot mode selection ON: Secure boot mode
OFF: Non-secure mode (Default)
2 Reference clock frequency of bank 1 ON: 125 MHz
OFF: 100 MHz (Default)
3 Reference clock frequency of bank 2 ON: 100 MHz
OFF: 125 MHz (Default)
4 Reference clock frequency of bank 3 ON: 100 MHz
OFF: 125 MHz (Default)
5 RCW source selection between NOR
and NAND flash ON: NAND flash
OFF: NOR flash (Default)
6 Not used
7 GPI for debugging ON: 1
OFF: 0 (Default)
8 Local bus on carrier ON: Enabled
OFF: Disabled (Default)