upd78f9211grt2-jjg-a ETC-unknow, upd78f9211grt2-jjg-a Datasheet - Page 182

• Manufacturer Part Number: upd78f9211grt2-jjg-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: ETC-unknow

11.2.2 STOP mode
Note
182
Item
System clock
CPU
Port (latch)
16-bit timer/event counter 00
8-bit timer
H1
Watchdog
timer
A/D converter
Power-on-clear circuit
Low-voltage detector
External interrupt
(1) STOP mode setting and operating statuses
The STOP mode is set by executing the STOP instruction.
Caution Because an interrupt request signal is used to clear the standby mode, if there is an interrupt
The operating statuses in the STOP mode are shown below.
(for the option byte, see CHAPTER 15 OPTION BYTE).
“Cannot be stopped” or “Stopped by software” is selected for low-speed internal oscillator by the option byte
Sets count clock to f
Sets count clock to f
“System clock” selected as
operating clock
“Low-speed internal oscillation
clock” selected as operating
clock
source with the interrupt request flag set and the interrupt mask flag reset, the standby
mode is immediately cleared if set. Thus, in the STOP mode, the normal operation mode is
restored after the STOP instruction is executed and then the operation is stopped for the
duration of 34
oscillation stabilization time select register (OSTS) has elapsed when crystal/ceramic
oscillation is used).
Setting of STOP Mode
XP
RL
/2
to f
7
Table 11-4. Operating Statuses in STOP Mode
µ
XP
s (TYP.) (after an additional wait time for stabilizing oscillation set by the
/2
12
CHAPTER 11 STANDBY FUNCTION
Oscillation stops.
Operation stops.
Holds status before STOP mode was set.
Operation stops.
Operation stops.
Operable
Setting disabled.
Operable
(Operation continues)
Operation stops.
Always operates.
Operable
Operable
Oscillator cannot be
Low-Speed Internal
User’s Manual U16994EJ3V0UD
stopped
Note
.
When Low-Speed Internal
Operable
Operation stops.
Operation stops.
Oscillation Continues
Low-Speed Internal Oscillator can be stopped
When Low-Speed Internal
Operation stops.
Oscillation Stops
Note
.