RL78/F13, F14 CHAPTER 15 SERIAL ARRAY UNIT
R01UH0368EJ0210 Rev.2.10 803
Dec 10, 2015
15.3.1 Peripheral enable register 0 (PER0)
PER0 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 array unit 0 is used, be sure to set bit 2 (SAU0EN) of this register to 1.
When serial array unit 1 is used, be sure to set bit 3 (SAU1EN) of this register to 1.
Set the PER0 register by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears the PER0 register to 00H.
Figure 15-4. Format of Peripheral Enable Register 0 (PER0)
Address: F00F0H After reset: 00H R/W
Symbol <7> 6 <5> <4> <3> <2> <1> <0>
PER0 RTCEN 0 ADCEN IICA0EN SAU1EN SAU0EN TAU1EN TAU0EN
SAUmEN Control of serial array unit m input clock supply
0
Stops supply of input clock.
• SFR used by serial array unit m cannot be written.
• Serial array unit m is in the reset status.
1
Enables input clock supply.
• SFR used by serial array unit m can be read/written.
Cautions 1. When setting serial array unit m, be sure to set the SAUmEN bit to 1 first. If SAUmEN = 0,
writing to a control register of serial array unit m is ignored, and, even if the register is read,
only the default value is read (except for the input switch control register (ISC), noise filter
enable register 0 (NFEN0), port input mode registers 1, 3, 5 to 7, 12 (PIM1, PIM3, PIM5 to PIM7,
PIM12), port output mode registers 1, 6, 7, 12 (POM1, POM6, POM7, POM12), port mode
registers 1, 3, 5 to 7, 12 (PM1, PM3, PM5 to PM7, PM12), port registers 1, 3, 5 to 7, 12 (P0, P1,
P3, P5 to P7, P12), port mode control register 12 (PMC12), port input threshold control registers
1, 3, 5 to 7, and 12 (PITHL1, PITHL3, PITHL5 to PITHL7, and PITHL12), and port output slew rate
select register (PSRSEL)).
2. Be sure to clear the following bits to 0.
Bits 1, 3, 4, and 6 in the RL78/F13 (LIN incorporated) products with 20, 30, 32, 48, or 64 pins
and 16 Kbytes to 64 Kbytes of code flash memory
Bits 4 and 6 in 30-pin products of the RL78/F13 (CAN and LIN incorporated) and in 30-pin
products of the RL78/F14
Bit 6 in the products other than above
To Next Page
Loading...
Need help?
General
