S3C2440芯片手册,p237
NOTES:
1. Although the MPLL starts just after a reset, the MPLL output (Mpll) is not used as the system clock until the software
writes valid settings to the MPLLCON register. Before this valid setting, the clock from external crystal or EXTCLK source
will be used as the system clock directly. Even if the user does not want to change the default value of MPLLCON
register, the user should write the same value into MPLLCON register.
我的理解是:只有在配置了MPLLCON register后,时钟才生效,如果调换,可能分频器无法工作吧
不知道对不对
S3C2440芯片手册,p237
NOTES:
1. Although the MPLL starts just after a reset, the MPLL output (Mpll) is not used as the system clock until the software
writes valid settings to the MPLLCON register. Before this valid setting, the clock from external crystal or EXTCLK source
will be used as the system clock directly. Even if the user does not want to change the default value of MPLLCON
register, the user should write the same value into MPLLCON register.
我的理解是:只有在配置了MPLLCON register后,时钟才生效,如果调换,可能分频器无法工作吧
不知道对不对
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