Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 7 16-BIT TIMER/EVENT COUNTER AA (TAA)
R01UH0042EJ0500 Rev.5.00 Page 299 of 1513
Aug 12, 2011
(2/2)
Example when two capture registers are used (without using overflow interrupt)
FFFFH
16-bit counter
0000H
TAAnCE bit
INTTAAnOV signal
TAAnOVF bit
TAAnOVF0 flag
Note
TIAAn0 pin input
TAAnCCR0 register
TAAnOVF1 flag
Note
TIAAn1 pin input
TAAnCCR1 register
D10
D11
D00
D01
D10
<1> <2> <5> <6><3> <4>
D00
D11
D01
Note The TAAnOVF0 and TAAnOVF1 flags are set on the internal RAM by software.
<1> Read the TAAnCCR0 register (setting of the default value of the TIAAn0 pin input).
<2> Read the TAAnCCR1 register (setting of the default value of the TIAAn1 pin input).
<3> An overflow occurs. Nothing is done by software.
<4> Read the TAAnCCR0 register.
Read the overflow flag. If the overflow flag is 1, set only the TAAnOVF1 flag to 1, and clear the
overflow flag to 0.
Because the overflow flag is 1, the pulse width can be calculated by (10000H + D
01 − D00).
<5> Read the TAAnCCR1 register.
Read the overflow flag. Because the overflow flag is cleared in <4>, 0 is read.
Read the TAAnOVF1 flag. If the TAAnOVF1 flag is 1, clear it to 0.
Because the TAAnOVF1 flag is 1, the pulse width can be calculated by (10000H + D
11 − D10)
(correct).
<6> Same as <3>
Remark n = 0 to 3, 5