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CHAPTER 13 16-BIT I/O TIMER
■ Control Status Register of Free-run Timer (Upper)
Figure 13.3-4 Control Status Register of Free-run Timer (TCCSH0/1)
Address:
bit
00352F
H
ECKE
00353F
H
R/W
R/W
:
-
:
:
Table 13.3-2 Control Status Register of Free-run Timer (Upper)
Bit name
ECKE:
bit15
External clock enable
bit
bit14 to
Undefined
bit8
200
15
14
13
12
11
10
-
-
-
-
-
-
-
-
-
-
Readable and writable
Undefined
Initial value
• This bit chose between internal time clock and external clock from FRCK
• Writing "0": Internal clock selected.
• Writing "1": External clock selected.
TCCSH0/TCCSH1
9
8
Initial value
-
-
0 x x x x x x x
-
-
ECKE
0
Internal time clock
1
external clock from FRCK
Function
B
External clock enable
−
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