m30833fjgp Renesas Electronics Corporation., m30833fjgp Datasheet - Page 179

• Manufacturer Part Number: m30833fjgp
• Description: Renesas 16/32-bit Single-chip Microcomputer M16c Family / M32c/80 Series
• Manufacturer: Renesas Electronics Corporation.

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Table 14.10 Specifications in Event Counter Mode
2
0
Count Source
Counting Operation
Divide Ratio
Counter Start Condition
Counter Stop Condition
Interrupt Request Generation Timing The timer counter underflows
TBiIN Pin Function
Read from Timer
Write to Timer
14.2.2 Event Counter Mode
C
1
9
3 .
B
8 /
In event counter mode, the timer counts how many external signals are applied or how many times
another timer overflows and underflows. (See Table 14.10) Figure 14.21 shows the TBiMR register (i=0
to 5) in event counter mode.
0
1
3
0
3
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4
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Item
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0 -
n
3 .
1
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3
p
1
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2
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0
0
3
6
2
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• External signal applied to the TBi
• TBj overflows or underflows (j=i-1, except j=2 when i=0, j=5 when i=3)
• The timer decrements a counter value
1/(n+1)
The TBiS bit in the TABSR or TBSR register is set to "1" (starts counting)
The TBiS bit is set to "0" (stops counting)
Programmable I/O port or count source input
The TBi register indicates the value of the counter
• When the timer counter stops,
• While counting,
2
When the timer counter underflows, content of the reload register is reloaded into the
(It is transferred to the counter at the next reload timing)
C
program)
count register to continue counting
the value written to the TBi register is also written to both reload register and counter
the value written to the TBi register is written to the reload register
f o
8 /
4
3
8
) T
8
n : setting value of the TBi register
Specification
IN
pin (i = 0 to 5) (valid edge can be selected by
0000
16
to FFFF
14. Timer (Timer B)
16