Renesas rl78 User Manual

 

RL78/G1A 

 

CHAPTER  5   CLOCK  GENERATOR 

R01UH0305EJ0200  Rev.2.00 

 

 

152  

Jul 04, 2013 

These registers are used to enable or disable supplying the clock to the peripheral hardware.  Clock supply to the 

hardware that is not used is also stopped so as to decrease the power consumption and noise. 

To use the peripheral functions below, which are controlled by this register, set (1) the bit corresponding to each 

function before specifying the initial settings of the peripheral functions. 

•  Real-time clock, 12-bit interval timer 
• A/D converter 
•  Serial interface IICA0 
•  Serial array unit 1 
•  Serial array unit 0 
•  Timer array unit 0 

 

The PER0 register can be set by a 1-bit or 8-bit memory manipulation instruction. 

Reset signal generation clears these registers to 00H. 

 

 

Address:  F00F0H     After reset:  00H     R/W 

Symbol 

<7> 6 <5> 

<4> 

<3> 

<2> 1 <0> 

PER0 RTCEN 

0 

ADCEN 

IICA0EN

SAU1EN

SAU0EN

0 TAU0EN

 

RTCEN 

Control of real-time clock (RTC) and 12-bit interval timer input clock supply 

 

0 

Stops input clock supply. 
•  SFR used by the real-time clock (RTC) and 12-bit interval timer cannot be written. 
•  The real-time clock (RTC) and 12-bit interval timer are in the reset status. 

 1 

Enables input clock supply. 
•  SFR used by the real-time clock (RTC) and 12-bit interval timer can be read and written.