m30833fjgp Renesas Electronics Corporation., m30833fjgp Datasheet - Page 360
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m30833fjgp
Manufacturer Part Number
m30833fjgp
Description
Renesas 16/32-bit Single-chip Microcomputer M16c Family / M32c/80 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M30833FJGP.pdf
(527 pages)
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3
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Figure 22.12 C0BRP Register
Figure 22.11 C0REC Register
2
0
22.1.9 CAN0 Receive Error Count Register (C0REC Register)
22.1.10 CAN0 Baud Rate Prescaler (C0BRP Register)
1
C
9
3 .
B
8 /
0
1
3
0
The C0BRP register determines the Tq clock cycle of the CAN bit timing. The baud rate is obtained
from Tq clock cycle x Tq per bit.
Tq: Time quantum
SS: Synchronization Segment; 1 Tq
PBS1: Phase Buffer Segment 1; 2 to 8 Tq
3
In an error active or an error passive state, a count value of the reception error is stored into the
C0REC register. The counter is decremented when the CAN module has received data as expected
or is incremented when a receive error occurs.
The C0REC register is set to 127 when the C0REC register is 128 (error passive state) or more and
the CAN module has received as expected.
In a bus-off state, an indeterminate value is stored into the C0REC register. The C0REC register is
set to "00
J
G
4
a
0 -
o r
n
Tq clock cycle = (BRP+1) / f
Baud rate =
Tq per bit = SS + PTS + PBS1 + PBS2
CAN0 Receive Error Count Register
3 .
b7
1
u
CAN0 Baud Rate Prescaler
NOTES:
b7
, 1
3
p
NOTES:
1
1. Value is obtained by setting the SLEEP bit in the C0SLPR register to "1" (sleep mode exited) and
2. Do not set to "00
2
(
M
1. Value is obtained by setting the SLEEP bit in the C0SLPR register to "1" (sleep mode exited) and
0
supplying a clock to the CAN module after reset.
16
0
3
supplying a clock to the CAN module after reset.
6
2
" when the CAN module is placed in an error active state again.
C
8 /
Page 337
, 3
M
Tq clock cycle x Tq per bit
3
2
16
C
f o
b0
" (divide-by-1).
8 /
b0
4
3
Counter Value of Receive Error
8
) T
8
If setting value is n, the CPU clock is divided
by (n+1).
Symbol
C0REC
1
1
Symbol
C0BRP
Address
020B
Address
0217
Function
BRP: Setting value of the C0BRP register; 1-255
PTS: Propagation Time Segment; 1 to 8 Tq
PBS2: Phase Buffer Segment 2; 2 to 8 Tq
16
16
Function
After Reset
00
After reset
01
16
16
Setting Range
01
(1)
(1)
16
to FF
16 (2)
22. CAN Module
RW
RO
RW
RW
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