Manualsbrain.com
  1. Manuels
  2. Marques
  3. Renesas
  4. rl78
  5. Manuel D’Utilisation

Renesas rl78 Manuel D’Utilisation

Télécharger
Page de 1004
 
RL78/G1A 
 
CHAPTER  13   SERIAL  INTERFACE  IICA 
13.3  Registers Controlling Serial Interface IICA 
 
Serial interface IICA0 is controlled by the following registers. 
 
•  Peripheral enable register 0 (PER0) 
•  IICA control register 00 (IICCTL00) 
•  IICA flag register 0 (IICF0) 
•  IICA status register 0 (IICS0) 
•  IICA control register 01 (IICCTL01) 
•  IICA low-level width setting register 0 (IICWL0) 
•  IICA high-level width setting register 0 (IICWH0) 
•  Port mode register 6 (PM6) 
•  Port register 6 (P6) 
 
13.3.1  Peripheral enable register 0 (PER0) 
This register is used to enable or disable supplying the clock to the peripheral hardware.  Clock supply to a hardware 
macro that is not used is stopped in order to reduce the power consumption and noise. 
When serial interface IICA0 is used, be sure to set bit 4 (IICA0EN) of this register to 1. 
The PER0 register can be set by a 1-bit or 8-bit memory manipulation instruction. 
Reset signal generation clears this register to 00H. 
 
Figure 13-5.  Format of Peripheral Enable Register 0 (PER0) 
 
Address: F00F0H     After reset: 00H     R/W 
Symbol 
<7> <6> <5> <4> <3> <2> <1> <0> 
Jul 04, 2013 
PER0 RTCEN 
0 
ADCEN 
IICA0EN 
SAU1EN
Note 
SAU0EN 0 TAU0EN 
 
IICA0EN 
Control of serial interface IICA0 input clock supply 
Stops input clock supply. 
0 
•  SFR used by serial interface IICA0 cannot be written. 
•  Serial interface IICA0 is in the reset status. 
Enables input clock supply. 
1 
•  SFR used by serial interface IICA0 can be read/written. 
 
Note  32-, 48-, and 64-pin products only. 
 
Cautions 1.  When setting serial interface IICA0, be sure to set the following registers first while the 
IICA0EN bit is set to 1.  If IICA0EN = 0, the control registers of serial interface IICA are set to 
their initial values, and writing to them is ignored (except for port mode register 6 (PM6) and 
port register 6 (P6)). 
 
 
• IICA control register 00 (IICCTL00) 
 
 
• IICA flag register 0 (IICF0) 
 
 
• IICA status register 0 (IICS0) 
 
 
• IICA control register 01 (IICCTL01) 
 
 
• IICA low-level width setting register 0 (IICWL0) 
 
 
• IICA high-level width setting register 0 (IICWH0) 
 
 
2.  Be sure to clear the following bits to 0. 
 
 
25-pin products: bits 1, 3, 6 
 
 
32-, 48-, 64-pin products: bits 1, 6 
 
R01UH0305EJ0200  Rev.2.00 
 
 
572