h8s-2628 Renesas Electronics Corporation., h8s-2628 Datasheet - Page 444

• Manufacturer Part Number: h8s-2628
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 15 Controller Area Network (HCAN)
Time quanta (tq) is an integer multiple of the number of system clocks, and is determined by the
baud rate prescaler (BRP) as follows. f
The following formula is used to calculate the 1-bit time and bit rate.
Note:
Example: With a system clock of 24 MHz, a BRP setting of B'000000, a TSEG1 setting of
Table 15.3 Setting Range for TSEG1 and TSEG2 in BCR
Note: The time quantum values for TSEG1 and TSEG2 are determined by TSEG value
Rev. 3.00 Oct 04, 2005 page 404 of 598
REJ09B0155-0300
TSEG1
(BCR11 to BCR8)
* Settable when bits BRP is not B'000000.
A BCR value is used for BRP, TSEG1, and TSEG2.
f
tq = 2 (BPR setting + 1)/f
1-bit time = tq (3 + TSEG1 + TSEG2)
Bit rate = 1/Bit time
CLK
B'0101, and a TSEG2 setting of B'100:
Bit rate = 24/{2 (0 + 1) (3 + 5 + 4)} = 1 Mbps
= (system clock)
= f
CLK
/{2 (BPR setting + 1) (3 + TSEG1 + TSEG2)}
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Yes *
Yes *
Yes *
Yes *
Yes *
Yes *
Yes *
Yes *
Yes *
Yes *
Yes *
Yes *
001
No
CLK
CLK
is the system clock frequency.
010
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
TSEG2 (BCR14 to BCR12)
011
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
100
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
101
No
No
No
110
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
1.
111
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No