Texas Instruments Development Kit for TM4C129x,Tiva™ ARM® Cortex™ -M4 Microcontroller DK-TM4C129X DK-TM4C129X Datenbogen

DES Control (DES_CTRL)

Base 0x4403.8000
Offset 0x020
Type RW, reset 0x8000.0000

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

reserved

CONTEXT

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

Type

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

1

Reset

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

OUTPUT_READY

INPUT_READY

DIRECTION

TDES

MODE

reserved

R

R

RW

RW

RW

RW

R

R

R

R

R

R

R

R

R

R

Type

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Reset

Description

Reset

Type

Name

Bit/Field

If 1, this read-only status bit indicates that the context data registers can
be overwritten and the host is permitted to write the next context.

1

R

CONTEXT

31

Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.

0

R

reserved

30:6

Select CBC, ECB or CFB mode0x0: ECB mode0x1: CBC mode0x2:
CFB mode0x3: reserved

0

RW

MODE

5:4

Select DES or triple DES encryption/decryption.0x0: DES
mode0x1:TDESmode

0

RW

TDES

3

Select encryption/decryption 0x0: decryption is selected0x1: Encryption
is selected

0

RW

DIRECTION

2

When 1, ready to encrypt/decrypt data

0

R

INPUT_READY

1

When 1, Data decrypted/encrypted ready

0

R

OUTPUT_READY

0