NXP Semiconductors MWCT101 S Series, Reference Manual

Page: 789 / 1761

NOTE
1. If while continuing a command with a change in the CMD
field, a sequence error will occur. The CMD field must stay
consistent throughout the continuation of a command.
2. A general statement about all MAC and ENC/DEC
commands:
Per SHE specification, the User/Application must
manage any potential padding (blocks of bit length less
than the 128-bit block length) for all ENC/DEC
commands. While the CSEc module will manage all
potential padding for the MAC commands.
32.5.13.5 CMD_ENC_ECB
The Encrypt ECB command operates on a single 128-bit block of data. The function
encrypts a given PLAIN_TEXT (128-bits) with the key identified by the KEY_ID (5-
bits), and returns CIPHER_TEXT (128-bits). The ‘PAGE_LENGTH’ is use to tell the
operation how many 128-bit pages are to be processed. All data must be presented in
128-bit blocks (all padding must be done by the application). This command may also be
extended by using the CallSeq field to 0x01 for continued pages of data.
Table 32-66. Encrypt ECB command details
Parameter Direction Width
KEY_ID IN 5
PAGE_LENGTH IN 16
PLAIN_TEXT IN n * 128
CIPHER_TEXT OUT n * 128
CIPHER_TEXT = ENC
ECB,KEY, KEY_ID
(PLAIN_TEXT)
Error Codes: ERC_NO_ERROR, ERC_SEQUENCE_ERROR, ERC_KEY_NOT_AVAILABLE,
ERC_KEY_INVALID,ERC_KEY_EMPTY, ERC_MEMORY_FAILURE, ERC_BUSY, ERC_GENERAL_ERROR
CSEc Command and Data Structure for CSE_PRAM content writes/reads is as follows:
Figure 32-15. Encrypt ECB input parameter format
Byte
Page 0 1 2 3 4 5 6 7 8 9 A B C D E F
0 0x01 0x00 0x00 KeyID Error Bits Reserved PAGE_LENG
TH
1 PLAIN_TEXT 1 [0:15]
2 PLAIN_TEXT 2 [0:15]
Table continues on the next page...
Chapter 32 Flash Memory Module (FTFC)
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
NXP Semiconductors 789