UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 546

• Manufacturer Part Number: UPD78F0890GK(A)-GAJ-AX
• Description: 8BIT MCU, 128K FLASH, 7K RAM, LQFP
• Manufacturer: NEC

Specifications of UPD78F0890GK(A)-GAJ-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 10
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

18.2.2 STOP mode
(1) STOP mode setting and operating statuses
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The STOP mode is set by executing the STOP instruction, and it can be set only when the CPU clock before the
setting was the main system clock.
The operating statuses in the STOP mode are shown below.
Caution Because the interrupt request signal is used to clear the standby mode, if there is an
×: don’t care
interrupt source with the interrupt request flag set and the interrupt mask flag reset, the
standby mode is immediately cleared if set. Thus, the STOP mode is reset to the HALT mode
immediately after execution of the STOP instruction and the system returns to the operating
mode as soon as the wait time set using the oscillation stabilization time select register
(OSTS) has elapsed.
Maskable interrupt
request
Reset signal input
Table 18-2. Operation in Response to Interrupt Request in HALT Mode
Release Source
CHAPTER 18 STANDBY FUNCTION
MK××
User’s Manual U17554EJ4V0UD
0
0
0
0
0
1
−
PR××
0
0
1
1
1
×
−
IE
0
1
0
×
1
×
×
ISP
×
×
1
0
1
×
×
Next address
instruction execution
Interrupt servicing
execution
Next address
instruction execution
Interrupt servicing
execution
HALT mode held
Reset processing
Operation