Справочник Пользователя для Renesas M34570T-MCU

The M34570T-MCU uses a 74AC14 for its RESET signal input buffer, so that its electrical
characteristics differ from those of the actual chip. Table 5.1 lists the RESET signal input
characteristics of the M34570T-MCU.

Depending on the supply voltage and operation mode, use one of the following frequencies for the
system clock:

• Supply voltage 5V:

4.2MHz or less (medium-speed mode)

1.0MHz or less (high-speed mode)

• Supply voltage 3V:

4.2MHz or less (medium-speed mode)

2.0MHz or less (high-speed mode)

To change this clock frequency to suit that of the target system, use the oscillator circuit board OSC-2
(included) with the necessary parts attached.

For details about the oscillation circuit constants, consult your oscillator manufacturer.

The PC4504 and M34570T-MCU have their internal clock operating even during emulation, so that
the timer values keep changing.

Example:

(1) When single-stepping the program

(2) When registers or internal RAM are referenced or modified

H-level threshold voltage

L-level threshold voltage

Hysteresis voltage

Item

Symbol

V

P

V

N

V

H

Voltage

V

CC

=3.0V

V

CC

=4.5V

V

CC

=5.5V

V

CC

=3.0V

V

CC

=4.5V

V

CC

=5.5V

V

CC

=3.0V

V

CC

=4.5V

V

CC

=5.5V

Maximum

2.2V

3.2V

3.9V

-

-

-

1.2V

1.4V

1.6V

Minimum

-

-

-

0.5V

0.9V

1.1V

0.3V

0.4V

0.5V