NEC V850ES/F 3-L Series User Manual page 353

32-bit single-chip microcontroller

Table of Contents

16-Bit Timer/Event Counter AA

capture interrupt

capture interrupt

Figure 10-25

When TAAnCCS1 = 1 and TAAnCCS0 = 1 settings (capture function

description)

When TAAnCE = 1, the 16-bit counter counts from 0000H to FFFFH and free-

running count-up operation continues until TAAnCE = 0 is set. During this time,

values are captured by capture trigger operation and are written to the

TAAnCCR0 and TAAnCCR1 registers.

Regarding capture close to the overflow (FFFFH), judgment is made using the

overflow flag (TAAnOVF). However, if overflow occurs twice (two or more free-

running cycles), the capture trigger interval cannot be judged with the

TAAnOVF flag. In this case, the system should be revised.

Basic Operation Timing in Free-Running Mode

(TAAnCCS1 = 1, TAAnCCS0 = 1)

(TAAnOE0 = 1, TAAnOE1 = 1, TAAnOL0 = 0, TAAnOL1 = 0)

D00, D01, D02, D03:

Values captured to TAAnCCR0 register (0000H to FFFFH)

D10, D11, D12:

Values captured to TAAnCCR1 register (0000H to FFFFH)

TIAAn0: Set to rising edge detection (TAAnIS1, TAAnIS0 = 01)

TIAAn1: Set to falling edge detection (TAAnIS3, TAAnIS2 = 10)

User's Manual U18743EE1V2UM00