R8C33A Datasheet, PDF (232/617 Pages) Renesas Technology Corp – MCU M16C FAMILY / R8C/Tiny SERIES

Under development ^{Preliminary specification}
Specifications in this manual are tentative and subject to change.
R8C/33A Group
17.6.2 Operating Example
17. Timer RA
FFFFh
n
n = high level: the contents of TRA register, low level: the contents of TRAPRE register
Count start
Underflow
Count stop
Count stop
0000h
TSTART bit in
1
TRACR register
0
Set to 1 by program
Count start
Count start
Period
Measured pulse
1
(TRAIO pin input)
0
IR bit in TRAIC
1
register
0
TEDGF bit in
1
TRACR register
0
TUNDF bit in
1
TRACR register
0
Set to 0 when interrupt request is acknowledged, or set by program
Set to 0 by program
Set to 0 by program
The above applies under the following conditions.
• “H” level width of measured pulse is measured. (TEDGSEL = 1)
• TRAPRE = FFh
Figure 17.3 Operating Example of Pulse Width Measurement Mode
REJ09B0455-0010 Rev.0.10 Feb 29, 2008
Page 204 of 586