RL78/G1H CHAPTER 20 STANDBY FUNCTION
R01UH0575EJ0120 Rev. 1.20 Page 744 of 920
Dec 22, 2016
Remark Operation stopped: Operation is automatically stopped before switching to the STOP mode.
Operation disabled: Operation is stopped before switching to the STOP mode.
f
IH: High-speed on-chip oscillator clock fIL: Low-speed on-chip oscillator clock
f
X: X1 clock fEX: External main system clock
f
XT: XT1 clock fEXS: External subsystem clock
Table 20 - 4 Operating Statuses in SNOOZE Mode
STOP Mode Setting
Item
During STOP mode, receiving data signal from CSIp and UARTq, inputting timer trigger
signal to A/D converter, and generating DTC activation by interrupt
When CPU is Operating on High-speed On-chip Oscillator Clock (f
IH)
System clock Clock supply to the CPU is stopped
Main system
clock
f
IH Operation started
f
X Stopped
f
EX
Subsystem clock fXT Use of the status while in the STOP mode continues
f
EXS
fIL Set by bits 0 (WDSTBYON) and 4 (WDTON) of option byte (000C0H), and WUTMMCK0
bit of subsystem clock supply mode control register (OSMC)
• WUTMMCK0 = 1: Oscillates
• WUTMMCK0 = 0 and WDTON = 0: Stops
• WUTMMCK0 = 0, WDTON = 1, and WDSTBYON = 1: Oscillates
• WUTMMCK0 = 0, WDTON = 1, and WDSTBYON = 0: Stops
CPU Operation stopped
Code flash memory
Data flash memory
RAM Operation stopped (Operable while in the DTC is executed)
Port (latch) Use of the status while in the STOP mode continues
Timer array unit Operation disabled
Real-time clock (RTC) Operable
12-bit interval timer
Watchdog timer See
CHAPTER 12 WATCHDOG TIMER.
Timer RJ • Operable when the subsystem clock is selected as the count source and RTCLPC in
the OSMC register = 0
• Operable when the low-speed on-chip oscillator is selected as the count source
• Operation is disabled under any conditions other than the above
Clock output/buzzer output Operates when the subsystem clock is selected as the clock source for counting and the
RTCLPC bit is 0 (operation is disabled when a clock other than the subsystem clock is
selected and the RTCLPC bit is not 0).
A/D converter Operable
Serial array unit (SAU) Operation disabled
Serial interface (IICA) Operation disabled
Data transfer controller (DTC) Operable
Event link controller (ELC) Operable function blocks can be linked
Power-on-reset function Operable
Voltage detection function
External interrupt
CRC operation
function
High-speed CRC Operation stopped
General-purpose
CRC
Operation disabled
Illegal-memory access detection function Operable when executing the DTC
RAM parity error detection function
RAM guard function
SFR guard function
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