UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 548

• 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

Remark f
Cautions 1. To use the peripheral hardware that stops operation in the STOP mode, and the peripheral
548
f
f
f
f
f
2. Even if “internal low-speed oscillator can be stopped by software” is selected by the option
3. To shorten oscillation stabilization time after the STOP mode is released when the CPU operates
4. If the STOP instruction is executed when AMPH = 1, supply of the CPU clock is stopped for 4.06
RH
X
EXCLK
XT
EXCLKS
RL
:
:
:
:
hardware for which the clock that stops oscillating in the STOP mode after the STOP mode is
released, restart the peripheral hardware.
byte, the internal low-speed oscillator continues in the STOP mode in the status before the
STOP mode is set. To stop the internal low-speed oscillator in the STOP mode, stop it by
software and then execute the STOP instruction.
with the high-speed system clock (X1 oscillation), temporarily switch the CPU clock to the
internal high-speed oscillation clock before the next execution of the STOP instruction. Before
changing the CPU clock from the internal high-speed oscillator to the high-speed system clock
(X1 oscillation) after the STOP mode is released, check the oscillation stabilization time with the
oscillation stabilization time counter status register (OSTC).
to 16.12
selected as the CPU clock, or for the duration of 160 external clocks when the high-speed
system clock (external clock input) is selected as the CPU clock.
:
: External subsystem clock
Internal high-speed oscillation clock
X1 clock
External main system clock
XT1 clock
Internal low-speed oscillation clock
μ
s after the STOP mode is released when the internal high-speed oscillation clock is
CHAPTER 18 STANDBY FUNCTION
User’s Manual U17554EJ4V0UD