UPD78F0413GA-GAM-AX NEC, UPD78F0413GA-GAM-AX Datasheet - Page 124

• Manufacturer Part Number: UPD78F0413GA-GAM-AX
• Description: 8BIT UC, 32K FLASH, 1KB RAM, LCD
• Manufacturer: NEC

Specifications of UPD78F0413GA-GAM-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 30
• Ram Memory Size: 1024Byte
• Cpu Speed: 10MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 32KB
• Oscillator Type: External, Internal

5.5 Clock Generator Operation
mode (see Figure 5-1).
78K0/LC3, thus enabling the following.
(1) Enhancement of security function
(2) Improvement of performance
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The clock generator generates the following clocks and controls the operation modes of the CPU, such as standby
The CPU starts operation when the internal high-speed oscillator starts outputting after a reset release in the
When the X1 clock is set as the CPU clock by the default setting, the device cannot operate if the X1 clock is
damaged or badly connected and therefore does not operate after reset is released. However, the start clock of
the CPU is the internal high-speed oscillation clock, so the device can be started by the internal high-speed
oscillation clock after a reset release. Consequently, the system can be safely shut down by performing a
minimum operation, such as acknowledging a reset source by software or performing safety processing when
there is a malfunction.
Because the CPU can be started without waiting for the X1 clock oscillation stabilization time, the total
performance can be improved.
When the power supply voltage is turned on, the clock generator operation is shown in Figure 5-13.
Main system clock f
Subsystem clock f
Internal low-speed oscillation clock f
CPU clock f
Peripheral hardware clock f
High-speed system clock f
Internal high-speed oscillation clock f
XT1 clock f
X1 clock f
External main system clock f
CPU
X
XT
SUB
XP
PRS
XH
EXCLK
CHAPTER 5 CLOCK GENERATOR
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User’s Manual U18698EJ1V0UD
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