CHAPTER 18 STANDBY FUNCTION
Preliminary User’s Manual U16315EJ1V0UD
347
18.2 Standby Function Operation
18.2.1 HALT mode
(1) HALT mode
The HALT mode is set by executing the HALT instruction. HALT mode can be set regardless of whether the CPU
clock before the setting was the X1 input clock, Ring-OSC clock, or subsystem clock.
The operating statuses in the HALT mode are shown below.
Table 18-2. Operating Statuses in HALT Mode (1/2)
When HALT Instruction Is Executed While CPU Is
Operating on X1 Input Clock
When HALT Instruction Is Executed While CPU Is
Operating on Ring-OSC Clock
When Ring-OSC
Oscillation Continues
When Ring-OSC
Oscillation Stopped
Note 1
When X1 Input Clock
Oscillation Continues
When X1 Input Clock
Oscillation Stopped
HALT Mode Setting
Item
When
Subsystem
Clock Used
When
Subsystem
Clock Not
Used
When
Subsystem
Clock Used
When
Subsystem
Clock Not
Used
When
Subsystem
Clock Used
When
Subsystem
Clock Not
Used
When
Subsystem
Clock Used
When
Subsystem
Clock Not
Used
System clock
The X1 oscillator, Ring-OSC oscillator, and subsystem clock oscillator are able to oscillate. Clock supply to the
CPU is stopped.
CPU
Operation stopped
Port (latch)
Status before HALT mode was set is retained
16-bit timer/event counter 00
Operable
Operation stopped
8-bit timer/event counter 50
Operable
Operable only when TI50 is selected as the count clock
8-bit timer/event counter 51
Operable
Operable only when TI51 is selected as the count clock
8-bit timer H0
Operable
Operable only when TO50 is selected as the count
clock during 8-bit timer/event counter 50 operation
8-bit timer H1
Operable
Operable only when f
R
/2
7
is selected as the count clock
Watch timer
Operable
Operable
Note 2
Operable
Operable
Note 2
Operable
Note 3
Not operable Operable
Note 3
Not operable
Ring-OSC cannot
be stopped
Note 4
Operable
−
Operable
Watchdog
timer
Ring-OSC can be
stopped
Note 4
Operation stopped
A/D converter
Operable
Not operable
UART0
Operable
UART6
Operable
Operable only when TO50 is selected as the serial
clock during TM50 operation
Serial
interface
CSI10
Operable
Operable only when external SCK10 is selected as the
serial clock
Clock monitor
Operable
Operation stopped
Operable
Operation stopped
Power-on-clear function
Note 5
Operable
Low-voltage detection function
Operable
External interrupt
Operable
Notes 1.
When “Stopped by software” is selected for Ring-OSC by a mask option and Ring-OSC is stopped by
software (for mask options, see
CHAPTER 24 MASK OPTIONS
).
2.
Operable when the X1 input clock is selected.
3.
Operable when the subsystem clock is selected.
4.
“Ring-OSC cannot be stopped” or “Ring-OSC can be stopped by software” can be selected by a mask
option.
5.
When “POC used” is selected by a mask option.
Содержание 78K0/KD1 Series
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