Renesas RL78/D1A User Manual

RL78/F13, F14 CHAPTER 5 CLOCK GENERATOR
R01UH0368EJ0210 Rev.2.10 379
Dec 10, 2015
5.3.6 Peripheral Enable Registers 0, 1, 2 (PER0, PER1, PER2)
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 these registers, set (1) the bit corresponding to each
function before specifying the initial settings of the peripheral functions.
 Real-time clock
 A/D converter
 Serial interface IICA0
 Serial array unit 1
 Serial array unit 0
 Timer array unit 1
 Timer array unit 0
 D/A converter
 Comparator
 Timer RD
 DTC
 Timer RJ
 LIN0
 LIN1
 CAN
The PER0, PER1, and PER2 registers can be set by a 1-bit or 8-bit memory manipulation instruction.
Writing to the PER0, PER1, and PER2 registers is disabled when the GCSC bit of the IAWCTL register is set to 1.
Reset signal generation clears these registers to 00H.
Figure 5-8. Format of Peripheral Enable Register 0 (PER0) (1/3)
Address: F00F0H After reset: 00H R/W
Symbol <7> <6> <5> <4> <3> <2> <1> <0>
PER0
RTCEN
Note 1
0 ADCEN
IICA0EN SAU1EN
SAU0EN
TAU1EN
TAU0EN
RTCEN
Note 1
Control of supplying input clock
Note 2
for real-time clock (RTC)
0
Stops input clock supply.
 SFR used by the real-time clock (RTC) cannot be written.
 The real-time clock (RTC) is in the reset status.
1
Enables input clock supply.
 SFR used by the real-time clock (RTC) can be read and written.
Notes 1. The RTCCL register should be set before setting the RTCEN bit to 1.
2. The input clock that can be controlled by the RTCEN bit is used when the register that is
used by the real-time clock (RTC) is accessed from the CPU. The RTCEN bit cannot control
supply of the operating clock to the RTC.
Caution Be sure to clear the following bits to 0.
Bits 1, 3, 4, and 6 in the 20-, 30-, 32-, 48-, and 64-pin products of the RL78/F13 (LIN
incorporated) whose code flash memory is in the range from 16 Kbytes and 64 Kbytes
Bits 4 and 6 in the 30-pin products of the RL78/F13 (CAN and LIN incorporated) and 30-
pin products of the RL78/F14
Bit 6 in the products other than above

Renesas RL78/D1A Specifications

General

Brand	Renesas
Model	RL78/D1A
Category	Computer Hardware
Language	English