Renesas rl78 User Manual

 

RL78/G1A 

 

CHAPTER  6   TIMER  ARRAY  UNIT 

R01UH0305EJ0200  Rev.2.00 

 

 

230  

Jul 04, 2013 

 

 

 

Interrupt signal of the master channel

(INTTMmn)

TOLmn

TOMmn

TOEmn

<1>
<2>

<3>

<4>

<5>

TOmn write signal

TOmn pin

TOmn register

Set

Reset/toggle

Internal bus

Interrupt signal of the slave channel

(INTTMmp)

Controller

 

 

The following describes the TOmn pin output circuit. 

 

<1>   When TOMmn = 0 (master channel output mode), the set value of timer output level register m (TOLm) is 

ignored and only INTTM0p (slave channel timer interrupt) is transmitted to timer output register m (TOm). 

<2>  When TOMmn = 1 (slave channel output mode), both INTTMmn (master channel timer interrupt) and 

INTTM0p (slave channel timer interrupt) are transmitted to the TOm register. 

At this time, the TOLm register becomes valid and the signals are controlled as follows: 

 

  When TOLmn = 0:  Positive logic output (INTTMmn 

→ set, INTTM0p → reset) 

  When TOLmn = 1:  Negative logic output (INTTMmn 

→ reset, INTTM0p → set) 

 

When INTTMmn and INTTM0p are simultaneously generated, (0% output of PWM), INTTM0p (reset signal) 

takes priority, and INTTMmn (set signal) is masked. 

<3>  While timer output is enabled (TOEmn = 1), INTTMmn (master channel timer interrupt) and INTTM0p (slave 

channel timer interrupt) are transmitted to the TOm register.   Writing to the TOm register (TOmn write signal) 

becomes invalid. 

When TOEmn = 1, the TOmn pin output never changes with signals other than interrupt signals. 

To initialize the TOmn pin output level, it is necessary to set timer operation is stopped (TOEmn = 0) and to 

write a value to the TOm register. 

<4>  While timer output is disabled (TOEmn = 0), writing to the TOmn bit to the target channel (TOmn write signal) 

becomes valid. When timer output is disabled (TOEmn = 0), neither INTTMmn (master channel timer 

interrupt) nor INTTM0p (slave channel timer interrupt) is transmitted to the TOm register. 

<5>  The TOm register can always be read, and the TOmn pin output level can be checked. 

 

Remark  m: Unit number (m = 0) 

 

n: Channel number 

 

n = 0, 1, 3 to 7 

 

p: Slave channel number  

 

n < p 

≤ 7