UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 143

• 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

Cautions 1.
remark
2.
The clock which is not used as a CPU clock can be suspended by setup of software during
microcomputer operation. Moreover, high-speed oscillation clock and a high-speed system clock can
suspend a clock by execution of a STOP command (see (4) in 6.6.1 Controlling high-speed system
clock, (3) in 6.6.2 Example of controlling internal high-speed oscillation clock, and (4) in 6.6.3
Example of controlling subsystem clock).
When the standup of voltage until it reaches 1.8 V from the time of a power supply injection is
looser than 0.5 V/ms (MAX.), input a low level into RESET pin, or set up 2.7 V/1.59 V POC
mode (LVISTART = 1) from an option byte until it reaches 1.8 V from the time of a power
supply injection (refer to Figure 6-13). When a low level is inputted into RESET pin until it
reaches 1.8 V, after the reset release by RESET pin operates to the same timing as <2> of
Figure 6-12 or subsequent ones.
When using the external clock input from EXCLK pin and EXCLKS pin, oscillation stable
waiting time is unnecessary.
CHAPTER 6 CLOCK GENERATOR
User’s Manual U17554EJ4V0UD
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