CP Box Non Volatile Storage

CP Box contains its own NVS (Non-Volatile Storage) which is loaded from main serial flash (Winbond 25Q256JVEQ) and consists of multiple partitions.

NVS structure

Offset @ NVS	Offset @ Flash	Size	Description	Sample Data	Notes
0x0000	0x1C4000	0x08	Board ID (e.g. 0x2001010101010501)	20 01 01 01 01 01 04 01	Can be seen at EAP boot log
0x0021	0x1C4021	0x06	MAC address of CP Box (78:C8:81:62:A9:D6)	78 C8 81 62 A9 D6	78 C8 81 XX XX XX
0x0027	0x1C4027	0x06	2nd MAC address	FF FF FF FF FF FF	Used in special conditions?
0x0060	0x1C4060	0x01	DDR capacity: 01 = 256 MiB 02 = 512 MiB 03 = 1 GiB 04 = 2 GiB 05 = 4 GiB 06 = 8 GiB 07 = 16 GiB FF = 4 GiB	05
0x0061	0x1C4061	0x01	DDR number of device	02
0x0062	0x1C4062	0x01	DDR number of rank	01
0x0063	0x1C4063	0x01	DDR device width	01
0x0064	0x1C4064	0x01	DDR bus width	02
0x0065	0x1C4065	0x01	DDR memory controller initialization mode: 00 = Skip initialization at all 01 = Initialize DDR3 MC 02 = Initialize DDR4 MC	00
0x00A0	0x1C40A0	0x01			Related to L2?
0x0071	0x1C4071	0x01			Related to error notifications?
0x0077	0x1C4077	0x01			Related to power sequence?
0x007A	0x1C407A	0x01
0x0203	0x1C4203	0x01			Related to error notifications?
0x0211	0x1C4211	0x01	GbE trace length	FF
0x1010	0x1C5010	0x01	Flag to toggle EMC checksum validation for several NVS blocks (ID, HWCTRL, THERMAL): FF = Disabled otherwise = Enabled	FF	Disabled by default
0x1011	0x1C5011	0x01
0x1012	0x1C5012	0x01	Flag to toggle EMC UART: FF = Enabled otherwise = Disabled	FF	Enabled by default
0x1014	0x1C5014	0x01		FF
0x1015	0x1C5015	0x01		FF
0x1022	0x1C5022	0x01	Flag to toggle mode: FF = Normal otherwise = Special (private?)	FF	Normal mode is set by default
0x1200	0x1C5200	0x0400	Error log	FFs	Empty by default
0x4000	0x1C8000	0x10	Serial Number (e.g. 1AR2P20000001100)	31 41 52 32 50 32 30 30 30 30 30 30 31 31 30 30
0x531F	0x1C931F	0x01	Flag to toggle EAP UART: 01 = Enabled otherwise = Disabled	FF	Disabled by default