AT89C51CC03CA-7CTUM ATMEL [ATMEL Corporation], AT89C51CC03CA-7CTUM Datasheet - Page 116
AT89C51CC03CA-7CTUM
Manufacturer Part Number
AT89C51CC03CA-7CTUM
Description
Enhanced 8-bit MCU with CAN Controller and Flash Memory
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
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AT89C51CC03
Table 61. CANBT2 Register
CANBT2 (S:B5h)
CAN Bit Timing Registers 2
Note:
No default value after reset.
Number
Bit
6-5
3-1
7
7
4
0
-
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 52.
Bit Mnemonic Description
SJW 1
SJW1:0
PRS2:0
6
-
-
-
SJW 0
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Re-synchronization Jump Width
To compensate for phase shifts between clock oscillators of different bus
controllers, the controller must re-synchronize on any relevant signal edge of
the current transmission.
The synchronization jump width defines the maximum number of clock cycles.
A bit period may be shortened or lengthened by a re-synchronization.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Programming Time Segment
This part of the bit time is used to compensate for the physical delay times
within the network. It is twice the sum of the signal propagation time on the
bus line, the input comparator delay and the output driver delay.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
5
4
-
Tsjw = Tscl x (SJW [1..0] +1)
Tprs = Tscl x (PRS[2..0] + 1)
PRS 2
3
PRS 1
2
4182K–CAN–05/06
PRS 0
1
0
-
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