at89c51cc02ua-tdsum ATMEL Corporation, at89c51cc02ua-tdsum Datasheet - Page 102

• Manufacturer Part Number: at89c51cc02ua-tdsum
• Description: At89c51cc02, T89c51cc02 Enhanced 8-bit Microcontroller With Can Controller And Flash
• Manufacturer: ATMEL Corporation

102
AT/T89C51CC02
Table 67. CANBT3 Register
CANBT3 (S:B6h)
CAN bit Timing Registers 3
Note:
No default value after reset.
Bit Number
7
-
6 - 4
3 - 1
7
0
1. The CAN controller bit timing registers must be accessed only if the CAN controller is
disabled with the ENA bit of the CANGCON register set to 0.
See Figure 41.
PHS2 2
6
Bit Mnemonic
PHS2 2:0
PHS1 2:0
SMP
PHS2 1
-
5
Description
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Phase Segment 2
This phase is used to compensate for phase edge errors. This
segment can be shortened by the re-synchronization jump width.
Phasse segment 2 is the maximum of Phase segment1 and the
Information Processing Time (= 2TQ).
Phase Segment 1
This phase is used to compensate for phase edge errors. This
segment can be lengthened by the re-synchronization jump width.
Sample Type
0 - once, at the sample point.
1 - three times, the threefold sampling of the bus is the sample
point and twice over a distance of a 1/2 period of the Tscl. The
result corresponds to the majority decision of the three values.
PHS2 0
4
Tphs2 = Tscl x (PHS2[2..0] + 1)
Tphs1 = Tscl x (PHS1[2..0] + 1)
PHS1 2
3
PHS1 1
2
PHS1 0
1
4126L–CAN–01/08
SMP
0