UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 159

• Manufacturer Part Number: UPD78F0537DGA(T)-9EV-A
• Description: 8BIT MCU, 128K FLASH, 7KB RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F0537DGA(T)-9EV-A

• Controller Family/series: UPD78
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

Note
Cautions 1. A voltage oscillation stabilization time of 1.93 to 5.39 ms is required after the supply voltage
Remark While the microcontroller is operating, a clock that is not used as the CPU clock can be stopped via
When releasing a reset (above figure) or releasing STOP mode while the CPU is operating on the internal
high-speed oscillation clock, confirm the oscillation stabilization time for the X1 clock using the oscillation
stabilization time counter status register (OSTC). If the CPU operates on the high-speed system clock (X1
oscillation), set the oscillation stabilization time when releasing STOP mode using the oscillation
stabilization time select register (OSTS).
software settings.
stopped by executing the STOP instruction (see (4) in 6.6.1 Example of 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).
2. It is not necessary to wait for the oscillation stabilization time when an external clock input
reaches 1.59 V (TYP.). If the supply voltage rises from 1.59 V (TYP.) to 2.7 V (TYP.) within 1.93
ms, the power supply oscillation stabilization time of 0 to 5.39 ms is automatically generated
before reset processing.
from the EXCLK and EXCLKS pins is used.
The internal high-speed oscillation clock and high-speed system clock can be
CHAPTER 6 CLOCK GENERATOR
User’s Manual U17260EJ6V0UD
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