R8C2A Datasheet, PDF (176/609 Pages) Renesas Technology Corp – MCU

R8C/2A Group, R8C/2B Group
14. Timers
Table 14.1 Functional Comparison of Timers (1)
Item
Configuration
Count
Count sources
Timer RA
8-bit timer
with 8-bit
prescaler
(with reload
register)
Decrement
• f1
• f2
• f8
• fOCO
• fC32
Function
Count of the
internal count
source
Count of the
external count
source
External pulse
width/period
measurement
PWM output
Timer mode
Event counter
mode
Pulse width
measurement
mode, pulse
period
measurement
mode
Pulse output
mode⁽¹⁾,
Event counter
mode⁽¹⁾
One-shot
—
waveform
output
Three-phase —
waveforms
output
Timer
Timer mode
(only fC32
count)
Timer RB
8-bit timer with
8-bit prescaler
(with reload
register)
Timer RC
16-bit timer (with
input capture and
output compare)
Timer RD
16-bit timer × 2
(with input capture
and output
compare)
Timer RE
4-bit counter
8-bit counter
Decrement
• f1
• f2
• f8
• Timer RA
underflow
Timer mode
—
—
Increment
• f1
• f2
• f4
• f8
• f32
• fOCO40M
• TRCCLK
Timer mode
(output compare
function)
Timer mode
(output compare
function)
Timer mode (input
capture function; 4
pins)
Increment/
Decrement
• f1
• f2
• f4
• f8
• f32
• fOCO40M
• TRDIOA0
Timer mode
(output compare
function)
Timer mode
(output compare
function)
Timer mode (input
compare function;
2 channels × 4
pins)
Increment
• f4
• f8
• f32
• fC4
—
—
—
Programmable
waveform
generation
mode
Programmable
one-shot
generation
mode,
Programmable
wait one-shot
generation
mode
—
—
Timer mode
(output compare
function; 4 pins)⁽¹⁾,
PWM mode (3 pins),
PWM2 mode (1 pin)
PWM mode (3 pins)
—
—
Timer mode
(output compare
function; 2 channels
× 4 pins)⁽¹⁾,
PWM mode
(2 channels × 3 pins),
PWM3 mode
(2 channels × 2 pins)
PWM mode
(2 channels × 3 pins)
Reset
synchronous PWM
mode (2 channels
× 3 pins, Sawtooth
wave modulation),
Complementary
PWM mode
(2 channels × 3 pins,
triangular wave
modulation, dead
time)
—
Output
compare
mode⁽¹⁾
—
—
Real-time
clock mode
Timer RF
16-bit timer
(with input
capture and
output
compare)
Increment
• f1
• f8
• f32
Output
compare
mode
—
Input capture
mode
Output
compare
mode
—
—
—
NOTE:
1. Rectangular waves are output in these modes. Since the waves are inverted at each overflow, the “H” and “L” level widths of
the pulses are the same.
Rev.2.00 Nov 26, 2007 Page 156 of 580
REJ09B0324-0200