Rainbow-electronics T89C51CC01 Uživatelský manuál stáhnout pdf (Strana 95)

T89C51CC01

Rev. D – 17-Dec-01

Table 52. CANBT3 Register

CANBT3 (S:B6h)

CAN Bit Timing Registers 3

Note: The CAN controller bit timing registers must be accessed only if the CAN controller is dis-

abled with the ENA bit of the CANGCON register set to 0.

See Figure 35.

No default value after reset.

76543210

- PHS2 2 PHS2 1 PHS2 0 PHS1 2 PHS1 1 PHS1 0 SMP

Bit

Number

Bit

Mnemonic Description

Reserved

The value read from this bit is indeterminate. Do not set this bit.

6-4 PHS2 2:0

Phase segment 2

This phase is used to compensate for phase edge errors. This segment can be

shortened by the re-synchronization jump width.

3-1 PHS1 2:0

Phase segment 1

This phase is used to compensate for phase edge errors. This segment can be

lengthened by the re-synchronization jump width.

0SMP

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.

Tphs2 = Tscl x (PHS2[2..0] + 1)

Tphs1 = Tscl x (PHS1[2..0] + 1)

1 2 ... 90 91 92 93 94 95 96 97 98 99 100 ... 148 149

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Rainbow-electronics T89C51CC01 Uživatelský manuál Strana 95