Reference Guide

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Item
Non-Volatile
or Volatile
Qty
Reference
Designator
Size
Type (e.g.
Flash PROM,
EEPROM)
Can user
programs or
operating
system write
data to it during
normal
operation?
Purpose? (e.g.
boot code)
How is data
input to this
memory?
How is this memory write protected?
10GBASE-T Ethernet Pass-Through Module
Micro-controller
Non-Volatile
and Volatile
1
FReD
256K
Flash
32K
RAM
Flash/SRAM
No
Management,
monitoring and
control
I2C writes –
EC/MSM FW
updates
FW sections write protected in app
mode
PHY
Management
Controller
Non-Volatile
and Volatile
1 per
IOM
U_MCU1
256K
Flash
32K
RAM
Flash/SRAM
No
Ethernet PHY
Management and
control
I2C writes –
EC/MSM FW
updates
FW sections write protected in app
mode.
25 Gb Ethernet Pass-Through Module
Micro-controller
Non-Volatile
and Volatile
1
FReD
256K
Flash
32K
RAM
Flash/SRAM
No
Management,
monitoring and
control
I2C writes –
EC/MSM FW
updates
FW sections write protected in app
mode
PHY
Management
Controller
Non-Volatile
and Volatile
2 per
IOM
U_MCU1
and
U_MCU2
256K
Flash
32K
RAM
Flash/SRAM
No
Ethernet PHY
Management and
control
I2C writes –
EC/MSM FW
updates
FW sections write protected in app
mode.