CHAPTER 15 STANDBY FUNCTION
15.2 Standby Function Operation
15.2.1 HALT mode
(1) HALT mode
The HALT mode is set by executing the HALT instruction.
The operation status in the HALT mode is shown in the following table.
Table 15-1. HALT Mode Operating Status
Item
HALT Mode Operation Status While The Main
System Clock Is Running
HALT Mode Operation Status While The
Subsystem Clock Is Running
While the subsystem
clock is running
While the subsystem
clock is not running
While the main system
clock is running
While the main system
clock is not running
Main system clock
CPU
Oscillation enabled
Operation stopped
Oscillation stopped
Port (output latch)
16-bit timer
Remains in the state existing before the selection of HALT mode.
Operation enabled
Operation stopped
Operation enabledNote 1
Operation enabledNote 2
Operation enabledNote 4
8-bit timer
TM50
TM60
Operation enabled
Watch timer
Operation enabled
Operation enabled
Operation enabled
Operation stopped
Operation enabled
Operation enabledNote 6
Operation enabledNote 3
Operation enabled
Operation stopped
Watchdog timer
Serial interface
A/D converter
Operation stoppedNote 5
Operation enabledNote 4
LCD controller/driver
External interrupt
Operation enabledNote 3
Operation enabled
Notes 1. Operation is enabled only when input signal from timer 60 (timer 60 operation is enabled) is selected
as the count clock.
2. Operation is enabled when TMI60 is selected as the count clock.
3. Operation is enabled while the main system clock is selected.
4. Operation is enabled while the subsystem clock is selected.
5. Operation is enabled only when external clock is selected.
6. Maskable interrupt that is not masked
User’s Manual U15075EJ1V0UM00
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NEC [ NEC ]
