UPD78F1502AGK-GAK-AX Datasheet, PDF (224/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

Clock operation mode
control register
(CMC)
AMPH EXCLK OSCSEL
Clock operation status
control register
(CSC)
MSTOP
X1/P121
X2/EXCLK
/P122
High-speed system
clock oscillator
Crystal/ceramic
oscillation
External input
clock
fX
fMX
fEX
Option byte(000C1H)
FRQSEL2,
FRQSEL1
Internal high-speed
oscillator
Internal high-speed
oscillation (1 MHz (typ.))
fIH1
fIH
Internal high-speed
oscillation (8 MHz (typ.))
fIH8
20 MHz internal
fIH20
high-speed oscillator
Internal high-speed
oscillation (20 MHz (typ.))
fIH20
XT1/P123
XT2//P124
Subsystem clock
oscillator
fSUB
Crystal
oscillation
fXT
STOP mode
signal
Internal low-speed
oscillator
Internal low-speed
fIL
oscillation (30 kHz (typ.))
AMPHS1 AMPHS0 OSCSELS
Clock operation mode
control register
(CMC)
CLS
XTSTOP HIOSTOP
Clock operation status
control register
(CSC)
Figure 5-1. Block Diagram of Clock Generator
Internal bus
Oscillation stabilization
time select register (OSTS)
OSTS2 OSTS1 OSTS0
3
X1 oscillation
stabilization time counter
MOST MOST MOST MOST MOST MOST MOST MOST
8 9 10 11 13 15 17 18
Oscillation stabilization time
counterstatus register
(OSTC)
System clock control
register (CKC)
CLS
CSS
MCS MCM0 SDIV
MD
IV2
MD
IV1
MD
IV0
3
Standby control circuit
(see CHAPTER 24)
STOP mode
HALT mode
Normal operation
mode
fMAIN
Main system
clock source
selection
Option byte(000C0H)
WDTON
WDSTBYON
HALT/STOP mode signal
Watchdog timer
Clock output/
buzzer output
fMAIN/2⁵
fMAIN/2⁴
fMAIN/2³
fMAIN/2²
fMAIN/2
fMAIN
fSUB/2
fSUB
fMAINC
Selection of
CPU clock and fCLK
peripheral
hardware clock
source
fSUBC
fSUBC/2
Timer array unit 0
SDIV
CPU
Real-time counter,
clock output/buzzer output
DSCS SELDSC DSCON
20 MHz internal high-speed
oscillation control register
(DSCCTL)
Internal bus
RTC DAC ADC IICA SAU1 SAU0 TAU1 TAU0
EN EN EN EN EN EN EN EN
Peripheral enable register 0
(PER0)
Timer array unit 0
Timer array unit 1
Serial array unit 0
Serial array unit 1
Serial interface IICA
A/D converter, operational Amplifiers, voltage reference
D/A converter
Real-time counter