upd75112 Renesas Electronics Corporation., upd75112 Datasheet - Page 46

• Manufacturer Part Number: upd75112
• Description: 4-bit Single Chip-microcomputer
• Manufacturer: Renesas Electronics Corporation.

46
Oscillate Characteristics
(Ta = –40 to +85 C, V
Oscillator
Ceramic
oscillation
Crystal
oscillator
External
clock
PD75112, 75116
* 1: Oscillator frequency and X1 input frequency indicate only
2: The oscillation stabilizing time is necessary for oscillation
3: When the oscillator frequency is 4.19 MHz < f
characteristics of the oscillator. Refer to AC characteristics
for the instruction execution time.
to stabilize after V
or the STOP mode is released.
PCC=0011 should not be selected as instruction execution
time. If PCC=0011 is selected, 1 machine cycle becomes
less than 0.95 s, with the result that the specified MIN.
value of 0.95 s cannot be observed.
Recommended Constant
C1
C1
X1
X1
X1
DD
DD
PD74HCU04
= 2.7 to 6.0 V)
reaches oscillation voltage range MIN.
X2
X2
X2
C2
C2
Oscillator frequency
(f
Oscillation stabilizing
time*2
Oscillator frequency
(f
Oscillation stabilizing
time*2
X1 input frequency
(f
X1 input high and low
level widths (t
XX
XX
XX
X
)*1
)*1
)*1
5.0 MHz,
Parameter
XH
, t
XL
Note: When using the main system clock oscillator,
)
V
voltage range
Oscillation voltage
range MIN.
V
DD
DD
wiring in the area enclosed with the dotted line
should be carried out as follows to avoid an
adverse effect from wiring capacitance.
Test Condition
= oscillation
= 4.5 to 6.0 V
Wiring should be as short as possible.
Wiring should not cross other signal lines.
Wiring should not be placed close to a vary-
ing high current.
The potential of the oscillator capacitor
ground should be the same as V
Do not ground wiring to a ground pattern in
which a high current flows.
Do not fetch a signal from the oscillator.
MIN.
100
2.0
2.0
2.0
10
30
4
TYP.
4.19
MAX.
5.0*3
5.0*3
5.0*3
250
SS
.
MHz
MHz
MHz
Unit
ms
ms
ms
ns