Renesas RL78 Series User Manual

RL78/F13, F14 CHAPTER 23 STANDBY FUNCTION
R01UH0368EJ0210 Rev.2.10 1532
Dec 10, 2015
STOP Mode Setting
Item
When STOP Instruction Is Executed While CPU Is Operating on Main System Clock
When CPU Is
Operating on High-
speed On-chip
Oscillator clock (f
IH)
When CPU Is
Operating on X1
Clock (f
X)
When CPU Is
Operating on
External Main
System Clock (f
EX)
When CPU Is
Operating on PLL
Clock (f
PLL)
CRC operation
function
High-speed CRC Operation stopped
General-purpose CRC
Illegal-memory access detection function
RAM2 bit error detection function
RAM guard function
SFR guard function
CPU stack pointer monitor function
Operation stopped (operation can continue during vectored interrupt servicing)
Remark Operation stopped: Operation is automatically stopped before switching to the STOP mode.
Operation disabled: Operation is stopped before switching to the STOP mode.
fIH: 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
fPLL: PLL clock
f
WDT: WDT-dedicated low-speed on-chip oscillator clock
Cautions 1. To use the peripheral hardware that stops operation in the STOP mode, and the peripheral hardware
for which the clock that stops oscillating in the STOP mode after the STOP mode is released, restart
the peripheral hardware.
2. To stop the watchdog timer clock in the STOP mode, set bit 0 (WDSTBYON) of a user option byte
(000C0H/020C0H) to 0 (stop the watchdog timer operation in the HALT/STOP/SNOOZE mode).
3. To shorten oscillation stabilization time after the STOP mode is released when the CPU operates with
the high-speed system clock (X1 oscillation), temporarily switch the CPU clock to the high-speed on-
chip oscillator clock before the execution of the STOP instruction. Before changing the CPU clock
from the high-speed on-chip oscillator clock to the high-speed system clock (X1 oscillation) after the
STOP mode is released, check the oscillation stabilization time with the oscillation stabilization time
counter status register (OSTC).

Renesas RL78 Series Specifications

General

Brand	Renesas
Model	RL78 Series
Category	Computer Hardware
Language	English