UPD75P3036 NEC, UPD75P3036 Datasheet - Page 35

• Manufacturer Part Number: UPD75P3036
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER
• Manufacturer: NEC

Main System Clock Oscillation Circuit Characteristics (T
Notes 1.
Caution When using the main system clock oscillation circuit, wire the portion enclosed in the dotted
Ceramic
resonator
Crystal
resonator
External
clock
Resonator
2.
3.
line in the above figure as follows to prevent adverse influence due to wiring capacitance:
• Keep the wiring length as short as possible.
• Do not cross the wiring with 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 oscillation circuit at the same potential
• Do not ground to a power supply pattern through which a high current flows.
• Do not extract signals from the oscillation circuit.
The oscillation frequency and X1 input frequency shown above indicate characteristics of the
oscillation circuit only. For the instruction execution time, refer to AC Characteristics.
If the oscillation frequency is 4.19 MHz < f
clock control register (PCC) = 0011. If PCC = 0011, one machine cycle time is less than 0.95 s, falling
short of the rated value of 0.95 s.
The oscillation stabilization time is the time required for oscillation to be stabilized after V
applied or STOP mode has been released.
as V
C1
C1
DD
Recommended
X1
X1
.
X1
Constants
V
V
DD
DD
X2
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
)
X
Note 3
Note 3
6.0 MHz at 1.8 V V
A
After V
reached MIN. value of
oscillation voltage
range
V
DD
= –40 to +85 C, V
= 4.5 to 5.5 V
Conditions
DD
has
DD
< 2.7 V, do not select the processor
DD
MIN.
83.3
1.0
1.0
1.0
= 1.8 to 5.5 V)
TYP.
PD75P3036
6.0
6.0
6.0
MAX.
500
DD
10
30
Note 2
4
Note 2
Note 2
has been
MHz
MHz
MHz
Unit
ms
ms
ns
35