UPD753012GC NEC, UPD753012GC Datasheet - Page 56

• Manufacturer Part Number: UPD753012GC
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER
• Manufacturer: NEC

Main System Clock Oscillator Characteristics (T
Notes 1.
Caution When using the main system clock oscillator, wire the portion enclosed by the dotted line in
56
Ceramic
oscillator
Crystal
oscillator
External
clock
Oscillator
2.
3.
4.
the above figure as follows to prevent adverse influence from wiring capacitance:
· Keep the wiring length as short as possible.
· Do not cross the wiring with any other signal lines.
· Do not route the wiring in the vicinity of a line through which a high alternating current flows.
· Always keep the ground point of the capacitor of the oscillator at the same potential as V
· Do not ground to a power supply pattern through which a high current flows.
· Do not extract any signal from the oscillator.
The oscillation frequency and X1 input frequency shown above indicate characteristics of the oscillator
only. For the instruction execution time, refer to AC Characteristics.
When the oscillation frequency is 4.7 MHz < f
than 0011 to the processor clock control register (PCC). If 0011 is assigned to PCC, one machine cycle
falls short of the rated value of 0.85 s.
The oscillation stabilization time is the time required for oscillation to stabilize after V
applied or STOP mode has been released.
When the X1 input frequency is 4.19 MHz < f
than 0011 to the processor clock control register (PCC). If 0011 is assigned to PCC, one machine cycle
falls short of the rated value of 0.95 s.
C1
C1
Recommended
X1
X1
X1
Constants
V
V
DD
X2
DD
X2
X2
C2
C2
Oscillation frequency
(f
Oscillation
stabilization time
Oscillation frequency
(f
Oscillation
stabilization time
X1 input frequency
(f
X1 input high-,
low-level widths
(t
X
X
X
XH
)
)
)
Note 1
Note 1
Note 1
, t
XL
Parameter
)
A
= –40 to +85 ˚C)
Note 3
Note 3
X
X
6.0 MHz at 1.8 V
6.0 MHz at 2.2 V
reached MIN. value of
oscillation voltage
range
V
V
After V
V
V
V
V
DD
DD
DD
DD
DD
DD
= 2.2 to 5.5 V
= 2.2 to 5.5 V
= 4.5 to 5.5 V
= 2.2 to 5.5 V
= 1.8 to 5.5 V
= 1.8 to 5.5 V
Conditions
DD
has
PD753012, 753016, 753017
V
V
DD
DD
< 2.7 V, assign a value other
< 2.7 V, assign a value other
MIN.
83.3
1.0
1.0
1.0
TYP.
6.0
6.0
6.0
MAX.
500
DD
10
30
Note 2
4
Note 2
Note 4
has been
MHz
MHz
MHz
Unit
ms
ms
ns
DD
.