
Table 32-49. Program Partition command FCCOB requirements (continued)
FCCOB Number
FCCOB Contents [7:0]
4
EEPROM Data Set Size Code
5
FlexNVM Partition Code
Table 32-50. CSEc/SHE key size
FCCOB1 [1:0]
Number of Flash Keys
({MASTER_ECU_KEY,
BOOT_MAC_KEY, BOOT_MAC,
KEY_<n>})
Number of Bytes (subtracts from the
total EEERAM space)
2'b00
Zero
0
2'b01
1 to 5 keys
128 Bytes
2'b10
1 to 10 keys
256 Bytes
2'b11
1 to 20 keys
512 Bytes
For non-CSEc enabled parts, the number of Flash Keys must be configured as 2'b00 (no
keys).
For CSEc enabled parts, the number of Flash Keys is user configurable, but the space will
assume that the MASTER_ECU_KEY, BOOT_MAC_KEY and BOOT_MAC are there
(if any keys are enabled), and thus will occupy 3 key slots of the available 20 key slot
space. This results in leaving key slots for a range of 1 to 17 User Key_<n> keys.
For non-CSEc enabled parts the key allocation must be set to Zero keys (2'b00),
otherwise the command will return an error.
NOTE
For CSEc enabled parts, once Flash Keys are allocated
(regardless of being initialized or not), the SHE spec
requirement of not erasing Flash Keys without authentication
will apply. This will mean Authentication (DBG_CHAL &
DBG_AUTH) commands must be run and pass (removing all
flash keys) before erase of the DFlash (all Flash Keys are
backed up in emulated EEPROM in DFlash). Thus Erase All
Blocks and Erase All Blocks Unsecure will not work, nor will
Erase Flash Block or Sector IF the selected Block/Sector
includes the DFlash where the keys are stored. Additionally if
any Flash Keys are write protected, they can't be erased/
removed, thus the DFlash can't be erased and the
Authentication process will not pass.
Chapter 32 Flash Memory Module (FTFC)
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
NXP Semiconductors
771
Содержание MWCT101 S Series
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