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CHAPTER 20 STANDBY FUNCTION
User’s Manual U19780EJ2V0UD
542
Table 20-1. Operating Statuses in HALT Mode (2/2)
HALT Mode Setting
Item
When HALT Instruction Is Executed While CPU Is Operating on Subsystem Clock
System clock
Clock supply to the CPU is stopped
f
RH
f
X
Status before HALT mode was set is retained
Main system clock
f
EXCLK
Operates or stops by external clock input
Subsystem
clock
(f
SUB
)
Operation continues (cannot be stopped)
Internal
low-speed
oscillation clock (f
RL
)
Status before HALT mode was set is retained
CPU
Flash memory
Operation stopped
RAM
Port (latch)
Status before HALT mode was set is retained
16-bit timer/event counter 00
Note
Operable. However, operation disabled when peripheral hardware clock (f
PRS
) is stopped.
50
Note
8-bit timer/event
counter
51
Note
H0
8-bit timer
H1
Real-time counter (RTC)
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.
Clock output
Operable
A/D converter
Not operable
Operational amplifier
Disables operation
UART6
CSI10
Note
Serial interface
IICA
Note
Multiplier/divider
Power-on-clear function
Low-voltage detection function
External interrupt
Operable
Note
When the CPU is operating on the subsystem clock and the internal high-speed oscillation clock and high-
speed system clock have been stopped, do not start operation of these functions on the external clock input
from peripheral hardware pins.
Remarks 1.
f
RH
:
Internal high-speed oscillation clock,
f
X
: X1
clock
f
EXCLK
: External main system clock
2.
The functions mounted depend on the product. See
1.5 Block Diagram
and
1.6 Outline of
Functions
.