MC-78F0712-KIT Renesas Electronics America, MC-78F0712-KIT Datasheet - Page 88

• Manufacturer Part Number: MC-78F0712-KIT
• Description: KIT REF SYSTEM 78K0 UPD78F0712
• Manufacturer: Renesas Electronics America

Specifications of MC-78F0712-KIT

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5.5
mode (see Figure 5-1).
(1) Enhancement of security function
(2) Improvement of performance
86
PD78F0711 and 78F0712, thus enabling the following.
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 low-speed oscillator starts outputting after reset release in the
When the X1 input clock is set as the CPU clock by the default setting, the device cannot operate if the X1 input
clock is damaged or badly connected and therefore does not operate after reset is released. However, the start
clock of the CPU is the on-chip internal low-speed oscillation clock, so the device can be started by the internal
low-speed oscillation clock after 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 input 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 5-11.
Main system clock f
CPU clock f
Peripheral hardware clock f
Clock Generator Operation
High-speed system clock f
X1 clock f
Internal high-speed oscillation clock f
Internal low-speed oscillation clock f
CPU
X
XP
PRS
XH
CHAPTER 5 CLOCK GENERATOR
User’s Manual U17890EJ2V0UD
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