UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 555

• 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

(when X1 oscillation is selected)
(when X1 oscillation is selected)
Note Set P130 to high-level output by software.
Remark When reset is effected, P130 outputs a low level. If P130 is set to output a high level before reset is
Note Set P130 to high-level output by software.
Caution A watchdog timer internal reset resets the watchdog timer.
Remark When reset is effected, P130 outputs a low level. If P130 is set to output a high level before reset is
High-speed system clock
High-speed system clock
Internal reset signal
Internal reset signal
Internal high-speed
Internal high-speed
Watchdog timer
oscillation clock
oscillation clock
effected, the output signal of P130 can be dummy-output as the CPU reset signal.
effected, the output signal of P130 can be dummy-output as the CPU reset signal.
(except P130)
(except P130)
CPU clock
CPU clock
overflow
Port pin
Port pin
RESET
Port pin
Port pin
(P130)
(P130)
Figure 19-3. Timing of Reset Due to Watchdog Timer Overflow
Normal operation
Normal operation
Figure 19-2. Timing of Reset by RESET Input
CHAPTER 19 RESET FUNCTION
User’s Manual U17554EJ4V0UD
Delay
(oscillation stop)
(oscillation stop)
Reset period
Reset period
(5 s (TYP.))
Delay
accuracy stabilization
accuracy stabilization
Wait for oscillation
Wait for oscillation
(86 to 361 s)
(86 to 361 s)
(11 to 45 s)
(11 to 45 s)
processing
processing
Reset
Reset
Hi-Z
Hi-Z
Starting X1 oscillation is specified by software.
Starting X1 oscillation is specified by software.
Normal operation
(internal high-speed oscillation clock)
Normal operation
(internal high-speed oscillation clock)
Note
Note
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