UPD78F9502MA-CAC-A NEC, UPD78F9502MA-CAC-A Datasheet - Page 111

• Manufacturer Part Number: UPD78F9502MA-CAC-A
• Description: 8BIT MCU, 4K FLASH, 128B RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F9502MA-CAC-A

• Controller Family/series: UPD78F
• No. Of I/o's: 8
• Ram Memory Size: 128Byte
• Cpu Speed: 10MHz
• No. Of Timers: 2
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

9.2.2
Note
Item
System clock
CPU
Port (latch)
8-bit timer
H1
Watchdog
timer
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.
STOP mode
(for the option byte, see CHAPTER 13 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 s (TYP.).
Maskable interrupt request
Reset signal generation
: don’t care
Setting of STOP Mode
Table 9-3. Operation in Response to Interrupt Request in HALT Mode
Release Source
XP
RL
/2
to f
7
Table 9-4. Operating Statuses in STOP Mode
XP
/2
12
Preliminary User’s Manual U18681EJ1V0UD
CHAPTER 9 STANDBY FUNCTION
Oscillation stops.
Operation stops.
Holds status before STOP mode was set.
Operation stops.
Operable
Setting disabled.
Operable
(Operation continues)
Always operates.
Operable
Operable
Oscillator cannot be
Low-Speed Internal
MK
stopped
0
0
1
Note
IE
.
0
1
Next address instruction execution
Interrupt servicing execution
HALT mode held
Reset processing
When Low-Speed Internal
Operable
Operation stops.
Operation stops.
Oscillation Continues
Low-Speed Internal Oscillator can be stopped
Operation
When Low-Speed Internal
Operation stops.
Oscillation Stops
Note
.
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