CHAPTER 14 STANDBY FUNCTION
Preliminary User’s Manual U19014EJ1V0UD
413
Table 14-1. Operating Statuses in HALT Mode
When HALT Instruction Is Executed While CPU Is Operating on Main System Clock
HALT Mode Setting
Item
When CPU Is Operating on
Internal High-Speed
Oscillation Clock (f
RH
)
When CPU Is Operating on
X1 Clock (f
X
)
When CPU Is Operating on
External Main System Clock
(f
EXCLK
)
System clock
Clock supply to the CPU is stopped
f
RH
Operation continues (cannot
be stopped)
Status before HALT mode was set is retained
f
X
Status before HALT mode
was set is retained
Operation continues (cannot
be stopped)
Status before HALT mode
was set is retained
Main system clock
f
EXCLK
Operates or stops by external clock input
Operation continues (cannot
be stopped)
f
RL
Status before HALT mode was set is retained
PLL Operable
CPU Operation
stopped
Flash memory
Operation stopped
RAM
Status before HALT mode was set is retained
For chip
Regulator
For USB
Operable in normal operation mode.
Port (latch)
Status before HALT mode was set is retained
16-bit timer/event counter 00
50
8-bit timer/event
counter
51
8-bit timer H1
Operable
Watchdog timer
Operable. Clock supply to watchdog timer stops when “internal low-speed oscillator can be
stopped by software” is set by option byte.
UART6
CSI10
Serial interface
USB
Power-on-clear function
Low-voltage detection function
External interrupt
Operable
Remark
f
RH
:
Internal high-speed oscillation clock
f
X
: X1
clock
f
EXCLK
:
External main system clock
f
RL
:
Internal low-speed oscillation clock
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