µPD75P308

16

Oscillation

Oscillation stabilization

of oscillation voltage range

Crystal

Oscilaltion

Oscillation stabilization

External Clock

X1 input frequency

X1 input high-, low-level

MAIN SYSTEM CLOCK OSCILLATOR CIRCUIT CHARACTERISTICS

Oscillator

Item

Conditions

MIN.

TYP.

MAX.

Unit

X1

X2

C1

C2

X1

X2

C1

C2

X1

X2

PD74HCU04

µ

1.0

MHz

4ms

1.0

4.19

MHz

10

ms

1.0

MHz

100

500

ns

Recommended

Constants

* 1: The oscillation frequency and X1 input frequency are indicated only to express the characteristics of the

oscillator circuit.

For instruction execution time, refer to AC Characteristics.

range or the STOP mode has been released.

3: The oscillators below are recommended.

4: When the oscillation frequency is 4.19 MHz

< fx ≤ 5.0 MHz, do not select PCC = 0011 as the instruction

execution time: otherwise, one machine cycle is set to less than 0.95

µs, falling short of the rated

minimum value of 0.95

µs.

Caution: When using the oscillation circuit of the main system clock, wire the portion enclosed in dotted

line in the figures as follows to avoid adverse influences on the wiring capacity:

•

Keep the wiring length as short as possible.

•

Do not cross the wiring over the other signal lines. Do not route the wiring in the vicinity of

lines through which a high alternating current flows.

•

Always keep the ground point of the capacitor of the oscillator circuit at the same potential

•

Do not extract signals from the oscillation circuit.

5

5

CSA 2.00MG

30

30

4.75

5.25

CSA 4.19MG

30

30

4.75

5.25

CSA 4.19MGU

30

30

4.75

5.25

CST 4.19MG

30 pF (internal)

30 pF (internal)

4.75

5.25

C1

Murata

Mfg.

Co., Ltd.

Manufac-

turer

MAX.

MIN.

Oscillation

Voltage Range [V]

C2

External Capacitance [pF]

Product Name

RECOMMENDED OSCILLATION CIRCUIT CONSTANTS

°C)