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Chapter 10
Timer
Preliminary User’s Manual U15839EE1V0UM00
Figure 10-5:
Timer C control Register 0 (TMCC00) (2/2)
Bit Position
Bit Name
Function
6 to 4
CS2 to CS0
Selects the internal count clock for TMC0.
CS2
CS1
CS0
Count Clock
0
0
0
f
PCLK
/2
0
0
1
f
PCLK
/4
0
1
0
f
PCLK
/8
0
1
1
f
PCLK
/16
1
0
0
f
PCLK
/32
1
0
1
f
PCLK
/64
1
1
0
f
PCLK
/128
1
1
1
f
PCLK
/256
Caution:
Do not change the CS2 to CS0 bits during timer operation. If they
are to be changed, they must be changed after setting the CE bit to
"0". If the CS2 to CS0 bits are overwritten during timer operation,
the operation is not guaranteed.
Remark:
f
PCLK
: internal peripheral-clock
1
CE
Controls the operation of TMC0.
0: Disable count (timer stopped at 0000H and does not operate)
1: Perform count operation.
Caution:
If CE = 0, the external pulse output (TOC0) becomes inactive level
(The active level of TOC0 output is set with the ALV bit of the
TMCC01 register).
0
CAE
Controls the internal count clock (f
COUNT
).
0: Asynchronously reset entire TMC0 unit. Stop base clock supply to TMC0 unit.
1: Supply peripheral-clock (f
PCLK
) to TMC0 unit.
Cautions: 1. When CAE = 0 is set, the TMC0 unit can be reset
asynchronously.
2. When CAE = 0, the TMC0 unit is in a reset state. To operate
TMC0, first set CAE = 1.
3. When the CAE bit is changed from "1" to "0", all the registers of
the TMC0 unit are initialized. When again setting CAE = 1, be
sure to then again set all the registers of the TMC0 unit.
Summary of Contents for mPD703128
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