UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 545

• 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

(b) Release by reset signal generation
When the reset signal is generated, HALT mode is released, and then, as in the case with a normal reset
operation, the program is executed after branching to the reset vector address.
Remark f
Internal high-speed
Subsystem clock
(XT1 oscillation)
(X1 oscillation)
Status of CPU
oscillation clock
Status of CPU
system clock
Reset signal
Status of CPU
High-speed
Reset signal
Reset signal
X
: X1 clock oscillation frequency
(2) When internal high-speed oscillation clock is used as CPU clock
(1) When high-speed system clock is used as CPU clock
Normal operation
(internal high-speed
(subsystem clock)
Normal operation
Normal operation
system clock)
oscillation clock)
(high-speed
(3) When subsystem clock is used as CPU clock
Figure 18-4. HALT Mode Release by Reset
instruction
CHAPTER 18 STANDBY FUNCTION
Oscillates
instruction
Oscillates
HALT
instruction
Oscillates
HALT
HALT
User’s Manual U17554EJ4V0UD
HALT mode
HALT mode
HALT mode
Oscillation
Starting X1 oscillation is
stopped
Oscillation
period
Reset
specified by software.
stopped
Oscillation
period
Reset
stopped
period
Reset
accuracy stabilization
Wait for oscillation
(11 to 45 s)
processing
Oscillation
Starting XT1 oscillation is
(11 to 45 s)
stopped
processing
(86 to 361 s)
Reset
(11 to 45 s)
Oscillation
processing
specified by software.
Reset
stopped
Reset
Oscillation stabilization time
Normal operation mode
(internal high-speed
(internal high-speed
Oscillates
(internal high-speed
oscillation clock)
Oscillates
Normal operation
Normal operation
oscillation clock)
oscillation clock)
(2
Oscillates
11
/f
X
to 2
16
/f
X
)
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