Fujitsu FR81S User Manual
CHAPTER 21: 32-BIT FREE-RUN TIMER
7. Q&A
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER
: 32-BIT FREE-RUN TIMER
FUJITSU SEMICONDUCTOR CONFIDENTIAL
35
7.1. How to Select Internal Clock Dividers?
This section shows how to select internal clock dividers.
There are nine types of internal clock dividers. You can configure it using the clock selection bits
(TCCSn.ECKE [n=3 to 5]) and count clock bits (TCCSn.CLK[3:0] [n=3 to 5]).
Internal clock
Configuration
Clock selection
bit (ECKE)
Count clock bits (CLK[3:0])
To select F
PCLK
Set "0".
Set "0000".
To select 2/F
PCLK
Set "0".
Set "0001".
To select 4/F
PCLK
Set "0".
Set "0010".
To select 8/F
PCLK
Set "0".
Set "0011".
To select 16/F
PCLK
Set "0".
Set "0100".
To select 32/F
PCLK
Set "0".
Set "0101".
To select 64/F
PCLK
Set "0".
Set "0110".
To select 128/F
PCLK
Set "0".
Set "0111".
To select 256/F
PCLK
Set "0".
Set "1000".
MB91520 Series
MN705-00010-1v0-E
830