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CHAPTER 11 TIMEBASE TIMER
11.3.1 Timebase timer control register (TBTC)
The timebase timer control register (TBTC) provides the following settings:
• Selecting the interval time of the timebase timer
• Clearing the counter value of the timebase timer
• Enabling or disabling the interrupt request when an overflow occurs
• Checking and clearing the state of the interrupt request flag when an overflow occurs
■ Timebase Timer Control Register (TBTC)
Figure 11.3-2 Timebase Timer Control Register (TBTC)
1XX00100B
1213 11 10 9
14
R/W R/W R/W W R/W R/W
8
15
R/W
W
X
TBIE TBOF TBR TBC1 TBC0
Re-
served
HCLK: Oscillation clock
The parenthesized values are provided when the oscillation clock
operates at 4 MHz.
bit9 bit8
TBC1 TBC0 Interval time select bit
0 0
2
12
/HCLK (approx. 1.0 ms)
01
2
14
/HCLK (approx. 4.1 ms)
10
2
16
/HCLK (approx. 16.4 ms)
11
2
19
/HCLK (approx. 131.1 ms)
bit10
TBR Timebase timer counter clear bit
Read Write
0
"1" is always read.
Clear timebase timer counter.
Clear TBOF bit.
1No effect
bit11
TBOF Overflow interrupt request flag bit
Read Write
0 Without overflow of selected
count bit
Being clear.
1 With overflow of selected
count bit
No effect
bit12
TBIE Overflow interrupt enable bit
0 Disabling of overflow interrupt request
1 Enabling of overflow interrupt request
bit15
Re-
served
Reserved bit
1 "1" is always set.
Reset value
: Read/write
: Write only
: Indeterminate
: Reset value
: Undefined
Address
0000A9
H