UPD78F0386GK-8EU-A Renesas Electronics America, UPD78F0386GK-8EU-A Datasheet - Page 133

• Manufacturer Part Number: UPD78F0386GK-8EU-A
• Description: MCU 96KB FLASH 5KB RAM
• Manufacturer: Renesas Electronics America
• Series: 78K0/Lx2r

Specifications of UPD78F0386GK-8EU-A

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: LCD, LVD, POR, PWM, WDT
• Number Of I /o: 26
• Program Memory Size: 96KB (96K x 8)
• Program Memory Type: FLASH
• Ram Size: 5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

5.5 Clock Generator Operation
mode (see Figure 5-1).
78K0/LF2, thus enabling the following.
(1) Enhancement of security function
(2) Improvement of performance
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 5-12.
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
X1 clock f
External main system clock f
Internal high-speed oscillation clock f
XT1 clock f
External subsystem clock f
CPU
X
XT
SUB
XP
PRS
XH
EXCLKS
EXCLK
CHAPTER 5 CLOCK GENERATOR
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User’s Manual U17504EJ2V0UD
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