UPD75004 データシートの表示（PDF） - NEC => Renesas Technology

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UPD75004

4-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD75004, 75006, 75008

MAIN SYSTEM CLOCK OSCILLATOR CIRCUIT CHARACTERISTICS

(Ta = -40 to +85°C, VDD = 2.7 to 6.0 V)

Oscillator

Ceramic

Recommended

Constants

X1

C1

X2

C2

Item

Conditions

Oscillation

frequency(fXX)*1

VDD = Oscillation

voltage range

Oscillation stabiliza- After VDD come to

tion time*2

MIN. of oscillation

voltage range

MIN.

1.0

TYP. MAX. Unit

5.0*3 MHz

4

ms

Crystal

X1

C1

X2

C2

Oscillation

frequency (fXX)*1

Oscillation stabiliza- VDD = 4.5 to 6.0 V

tion time*2

1.0 4.19 5.0*3 MHz

10

ms

30

ms

External Clock

X1

X2

µPD74HCU04

X1 input frequency

(fX)*1

X1 input high-,

low-level widths

(tXH, tXL)

1.0

5.0*3 MHz

100

500 ns

*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.

2: Time required for oscillation to stabilize after VDD has been applied or the STOP mode has been

released.

3: When the oscillation frequency is 4.19 MHz < fx ≤ 5.0 MHz, do not select PCC = 0011 as the

5

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.

5

Note: 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 osccillator circuit at the same potential

as VSS. Do not connect the ground pattern through which a high current flows.

• Do not extract signals from the oscillation circuit.

41

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