PXS20RM Datasheet, PDF (289/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Cyclic Redundancy Checker (CRC) Unit
Table 14-3. CRC_INP field descriptions
Field
INP
Description
Input data for the CRC computation
The INP register can be written at byte, half-word (high and low) or word in any sequence. In case of
half-word write operation, the bytes must be contiguous.
This register can be read and written by the software.
14.5.3 CRC Current Status Register (CRC_CSTAT)
Offset: 0x8 + (N–1)0x10
Access: User read/write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
CSTAT[31:16]
W
Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
CSTAT[15:0]
W
Reset 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Figure 14-5. CRC Current Status Register (CRC_CSTAT)
Table 14-4. CRC_CSTAT field descriptions
Field
CSTAT
Description
Status of the CRC signature
The CSTAT register includes the current status of the CRC signature. No bit swap and inversion are
applied to this register.
In case of CRC-CCITT polynomial only the16 LSB bits are significative. The 16 MSB bits are tied at 0b
during the computation.
The CSTAT register can be written at byte, half-word or word.
This register can be read and written by the software.
This register can be written only during the configuration phase.
Freescale Semiconductor
PXS20 Microcontroller Reference Manual, Rev. 1
14-5