c8051f410 Silicon Laboratories, c8051f410 Datasheet - Page 124

• Manufacturer Part Number: c8051f410
• Description: 2.0 V, 32/16 Kb Flash, Smartclock, 12-bit Adc
• Manufacturer: Silicon Laboratories

C8051F410/1/2/3
124
Bits 7–5: UNUSED. Read = 0b. Write = don’t care.
Bit 4:
Bit 3:
Bit 2:
Bits 1–0: CRC0PNT. CRC0 Result Pointer.
Bits 7–0: CRC0IN: CRC Data Input
R/W
Bit7
Bit7
R
-
CRC0SEL: CRC0 Polynomial Select Bit.
0: CRC0 uses the 32-bit polynomial 0x04C11DB7 for calculating the CRC result.
1: CRC0 uses the 16-bit polynomial 0x1021 for calculating the CRC result.
CRC0INIT: CRC0 Result Initialization Bit.
Writing a ‘1’ to this bit initializes the entire CRC result based on CRC0VAL.
CRC0VAL: CRC0 Set Value Select Bit
This bit selects the set value of the CRC result.
0: CRC result is set to 0x00000000 on write of ‘1’ to CRC0INIT.
1: CRC result is set to 0xFFFFFFFF on write of ‘1’ to CRC0INIT.
These bits specify which byte of the CRC result will be read/written on the next access to
CRC0DAT. The value of these bits will auto-increment upon each read or write.
For CRC0SEL = 0:
00: CRC0DAT accesses bits 7–0 of the 32-bit CRC result.
01: CRC0DAT accesses bits 15–8 of the 32-bit CRC result.
10: CRC0DAT accesses bits 23–16 of the 32-bit CRC result.
11: CRC0DAT accesses bits 31–24 of the 32-bit CRC result.
For CRC0SEL = 1:
00: CRC0DAT accesses bits 7–0 of the 16-bit CRC result.
01: CRC0DAT accesses bits 15–8 of the 16-bit CRC result.
10: CRC0DAT accesses bits 7–0 of the 16-bit CRC result.
11: CRC0DAT accesses bits 15–8 of the 16-bit CRC result.
Each write to CRCIN results in the written data being computed into the existing CRC result.
R/W
Bit6
Bit6
R
-
SFR Definition 14.2. CRC0IN: CRC0 Data Input
SFR Definition 14.1. CRC0CN: CRC0 Control
R/W
Bit5
Bit5
R
-
CRC0SEL CRC0INIT CRC0VAL
R/W
R/W
Bit4
Bit4
Rev. 1.0
R/W
Bit3
Bit3
W
R/W
R/W
Bit2
Bit2
R/W
R/W
Bit1
Bit1
CRC0PNT
SFR Address:
SFR Address:
R/W
R/W
Bit0
Bit0
0x85
0x84
00000000
00000000
Reset Value
Reset Value