參數(shù)資料
型號: C505
廠商: SIEMENS AG
元件分類: 8位微控制器
英文描述: 8-Bit CMOS Microcontroller
中文描述: 8位CMOS微控制器
文件頁數(shù): 41/88頁
文件大?。?/td> 1224K
代理商: C505
C505/C505C/C505A/C505CA
Data Sheet
37
12.00
CAN Controller Software Initialization
The very first step of the initialization is the CAN controller input clock selection. A divide-by-2
prescaler is enabled by default after reset (
Figure 16
). Setting bit CMOD (SYSCON.3) disables the
prescaler. The purpose of the prescaler selection is:
to ensure that the CAN controller is operable when fosc is over 10 MHz (bit CMOD =0)
to achieve the maximum CAN baudrate of 1 Mbaud when fosc is 8 MHz (bit CMOD=1)
Figure 16
CAN controller Input Clock Selection
Note : The switch configuration shows the reset state of bit CMOD.
SYSCON.3
(CMOD)
0
1
MCS03296
2
f
OSC
Full-CAN
Module
CAN
f
Condition: CMOD = 0, when > 10 MHz
f
Frequency (MHz)
CMOD
(SYSCON.3)
BRP
(BTR0.0-5)
CAN
baudrate
(Mbaud/sec)
f
OSC
f
CAN
8
8
1
000000B
000000B
000000B
1
8
4
0
0
0.5
16
8
1
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