Renesas g1a Answering Machine User Manual


  Open as PDF
of 1004
 
RL78/G1A CHAPTER 12 SERIAL ARRAY UNIT
R01UH0305EJ0200 Rev.2.00 410
Jul 04, 2013
12.3.1 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.
The PER0 register can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears the PER0 register to 00H.
Figure 12-4. 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
Note
SAU0EN 0 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.
Note 32, 48, and 64-pin products only.
Cautions 1. When setting serial array unit m, be sure to first set the following registers with the SAUmEN
bit set to 1. If SAUmEN = 0, control registers of serial array unit m become default values and
writing to them is ignored (except for the input switch control register (ISC), noise filter enable
register 0 (NFEN0), port input mode registers 0, 1 (PIM0, PIM1), port output mode registers 0, 1,
5, 7 (POM0, POM1, POM5, POM7), Port mode contorol registers 0, 1, 3, 5, 7 (PMC0, PMC1,
PMC3, PMC5, PMC7), port mode registers 0, 1, 3, 5, 7 (PM0, PM1, PM3, PM5, PM7), and port
registers 0, 1, 3, 5, 7 (P0, P1, P3, P5, P7)).
Serial clock select register m (SPSm)
Serial mode register mn (SMRmn)
Serial communication operation setting register mn (SCRmn)
Serial data register mn (SDRmn)
Serial flag clear trigger register mn (SIRmn)
Serial status register mn (SSRmn)
Serial channel start register m (SSm)
Serial channel stop register m (STm)
Serial channel enable status register m (SEm)
Serial output enable register m (SOEm)
Serial output level register m (SOLm)
Serial output register m (SOm)
Serial standby control register m (SSCm)
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
Remark m: Unit number (m = 0, 1)
<R>