Renesas rl78 User Manual

 

RL78/G1A 

 

CHAPTER  6   TIMER  ARRAY  UNIT 

R01UH0305EJ0200  Rev.2.00 

 

 

194  

Jul 04, 2013 

The TCRmn register read value differs as follows according to operation mode changes and the operating status. 

 

Timer count register mn (TCRmn) Read Value

 

Operation Mode 

Count Mode 

Value if the 

operation mode 

was changed after 

releasing reset 

Value if the 

operation was count 

operation paused 

(TTmn = 1) 

Value if the 

operation mode was 

changed after count 

operation paused 

(TTmn = 1) 

Value when waiting 

for a start trigger 

after one count 

Interval timer 

mode 

Count down 

FFFFH 

Value if stop 

Undefined  

− 

Capture mode 

Count up 

0000H 

Value if stop 

Undefined  

− 

Event counter 

mode 

Count down 

FFFFH 

Value if stop 

Undefined  

− 

One-count mode 

Count down 

FFFFH 

Value if stop 

Undefined  

FFFFH 

Capture & one-

count mode 

Count up 

0000H 

Value if stop 

Undefined  

Capture value of 

TDRmn register + 1

Note  This indicates the value read from the TCRmn register when channel n has stopped operating as a timer (TEmn = 0) 

and has been enabled to operate as a counter (TSmn = 1).  The read value is held in the TCRmn register until the 

count operation starts.   

 

Remark  m: Unit number (m = 0), n: Channel number (n = 0 to 7)