M-V850E-IA4 Renesas Electronics America, M-V850E-IA4 Datasheet - Page 268

• Manufacturer Part Number: M-V850E-IA4
• Description: KIT EVAL V850E IA4 UPD70F3186
• Manufacturer: Renesas Electronics America

Specifications of M-V850E-IA4

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

266
Note The overflow counter is set arbitrarily by software on the internal RAM.
<1> Read the TPkCCRa register (setting of the default value of the TIPka pin input).
<2> An overflow occurs. Increment the overflow counter and clear the overflow flag to 0 in the overflow
<3> An overflow occurs a second time. Increment (+1) the overflow counter and clear the overflow flag
<4> Read the TPkCCRa register.
Remark
TPkCCRa register
INTTPkOV signal
interrupt servicing.
to 0 in the overflow interrupt servicing.
Read the overflow counter.
→ When the overflow counter is “N”, the pulse width can be calculated by (N × 10000H + D
Clear the overflow counter (0H).
TIPka pin input
16-bit counter
D
In this example, the pulse width is (20000H + D
TPkOVF bit
a0
counter
k = 0, 2
a = 0, 1
TPkCE bit
).
Overflow
FFFFH
0000H
Note
CHAPTER 6 16-BIT TIMER/EVENT COUNTER P (TMP)
Example when capture trigger interval is long
User’s Manual U16543EJ4V0UD
0H
D
a0
<1> <2>
a1
1 cycle of 16-bit counter
– D
a0
Pulse width
) because an overflow occurs twice.
D
1H
a0
<3> <4>
D
a1
2H 0H
D
a1
a1
–