Filter
Top Products
RL78/G1A CHAPTER 5 CLOCK GENERATOR
R01UH0305EJ0200 Rev.2.00 142
Jul 04, 2013
Figure 5-1. Block Diagram of Clock Generator
System clock control
register (CKC)
Oscillation stabilization
time select register (OSTS)
Oscillation stabilization
time counter status
register (OSTC)
STOP mode
signal
Clock operation mode
control register
(CMC)
Clock operation status
control register
(CSC)
High-speed system
clock oscillator
Internal bus
XT1/P123
XT2/EXCLKS
/P124
f
SUB
f
CLK
CSSCLS
OSTS1 OSTS0OSTS2
3
MOST
18
MOST
17
MOST
15
MOST
13
MOST
11
MSTOP
EXCLK
OSCSEL
AMPH
f
MX
f
XT
X1/P121
X2/EXCLK
/P122
f
X
f
EX
MCM0
MCS
CPU
MOST
10
MOST
9
MOST
8
XTSTOP
HIOSTOP
OSCSELSAMPHS0AMPHS1
CLS
f
IH
f
MAIN
f
IL
f
EXS
EXCLKS
High-speed on-chip oscillator
trimming register(HIOTRM)
HIOTRM0
6
HIOTRM1HIOTRM2
HIOTRM3
HIOTRM4
HIOTRM5
X1 oscillation
stabilization time counter
Normal
operation mode
HALT mode
STOP mode
Standby controller
Crystal/ceramic
oscillation
Subsystem clock
oscillator
External input
clock
External input
clock
High-speed on-chip oscillator
IOscillation (4 MHz (TYP.))
Oscillation (12 MHz (TYP.))
Oscillation (24MHz (TYP.))
Oscillation (8 MHz (TYP.))
Oscillation (16 MHz (TYP.))Oscillation (32 MHz (TYP.))
Crystal
oscillation
Low-speed
on-chip oscillator
Oscillation (15 kHz (TYP.))
Main system clock
source selector
Option byte (000C0H)
WDTON
WDSTBYON
HALT/STOP mode signal
Watchdog timer
CPU clock
and peripheral
hardware
clock source
selection
Clock output/
buzzer output
Serial array unit 0
Serial array unit 1
A/D converter
Serial interface IICA0
Internal bus
Peripheral enable
register 0 (PER0)
Clock operation
status control
register (CSC)
Clock operation mode
control register
(CMC)
Controller
Option byte (000C2H)
FRQSEL0 to FRQSEL3
High-speed system
clock oscillator
Oscillation (1 MHz (TYP.))
Selector
Controller
Real-time clock,
12-bit Interval timer
Timer array unit 0
HOCODIV2
HOCODIV1 HOCODIV0
High-speed on-chip
oscillator frequency select
register (HOCODIV)
SAU0
EN
SAU1
EN
IICA0
EN
ADC
EN
RTC
EN
TAU0
EN
WUTMMCK0RTCLPC
Subsystem clock supply
mode control register
(OSMC)
Selector
Controller
WUTMMCK0
Oscillation (6 MHz (TYP.))
IOscillation (3 MHz (TYP.)) IOscillation (2 MHz (TYP.))
(Remark is listed on the next page after next.)
<R>