Renesas R8C/20

R8C/20 Group, R8C/21 Group 14. Timers
Rev.2.00 Aug 27, 2008 Page 134 of 458
REJ09B0250-0200
Figure 14.11 TRAIOC Register in Pulse Period Measurement Mode
Timer RA I/O Control Register
Symbol Address After Reset
TRAIOC
0101h 00h
Bit Symbol Bit Name Function RW
INT1
_
____
/TRAIO select bit 0 : INT1
_
____
/TRAIO pin (P1_7)
1 : INT1
_
____
/TRAIO pin (P1_5)
NOTE:
1. When the same value from the TRAIO pin is sampled three times continuously, the input is determined.
b3 b2
TIOSEL
b1 b0
0 : Measures measurement pulse from one rising
edge to next rising edge
1 : Measures measurement pulse from one falling
edge to next falling edge
00
b7 b6 b5 b4
RW
TRAIO polarity sw itch bit
—
TOPCR RW
TOENA RW
RW
TIPF0
TRAO output enable bit
TRAIO input filter select
bits
(1)
b5 b4
0 0 : No filter
0 1 : Filter w ith f1 sampling
1 0 : Filter w ith f8 sampling
1 1 : Filter w ith f32 sampling
TEDGSEL
TRAIO output control bit Set to 0 in pulse period measurement mode
RW
RWTIPF1
—
(b7-b6)
Nothing is assigned. If necessary, set to 0.
When read, the content is 0.