Renesas rl78 User Manual

Page of 1004
 
RL78/G1A 
 
CHAPTER  6   TIMER  ARRAY  UNIT 
R01UH0305EJ0200  Rev.2.00 
 
 
185  
Jul 04, 2013 
(6) Measurement 
of 
high-/low-level width of input signal 
Counting is started by a single edge of the signal input to the timer input pin (TImn), and the count value is 
captured at the other edge.  In this way, the high-level or low-level width of the input signal can be measured. 
 
Edge detection
Timer input
(TImn)
Capture
xxH
00H
Start
Channel n
Capture operation
 
 
(7) Delay 
counter 
Counting is started at the valid edge of the signal input to the timer input pin (TImn), and an interrupt is generated 
after any delay period. 
 
Edge detection
Timer input
(TImn)
Channel n
Compare operation
Interrupt signal
(INTTMmn)
Start
 
 
Remarks 1  m: Unit number (m = 0), n: Channel number (n = 0 to 7 (however, timer input pin (TImn), timer output pin 
(TOmn) : n = 0, 1, 3 to 7)) 
 2. 
The presence or absence of timer I/O pins of channel 0 to 7 depends on the product. See Table 6-2  
Timer I/O Pins provided in Each Product for details. 
 
6.1.2  Simultaneous channel operation function 
By using the combination of a master channel (a reference timer mainly controlling the cycle) and slave channels 
(timers operating according to the master channel), channels can be used for the following purposes. 
 
(1)  One-shot pulse output 
Two channels are used as a set to generate a one-shot pulse with a specified output timing and a specified pulse 
width. 
 
Timer output
(TOmp)
Interrupt signal (INTTMmn)
Edge detection
Timer input
(TImn)
Set
(Master)
Output
timing
Pulse width
Start
(Master)
Reset
(Slave)
Channel n (master)
Channel p (slave)
Compare operation
Compare operation
 
 
(2)  PWM (Pulse Width Modulation) output 
Two channels are used as a set to generate a pulse with a specified period and a specified duty factor. 
 
Operation clock
Duty
Period
Compare operation
Compare operation
Channel n (master)
Channel p (slave)
Timer output
(TOmp)
Interrupt signal (INTTMmn)
 
 
(Caution is listed on the next page.) 
 
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