upd78p058f Renesas Electronics Corporation., upd78p058f Datasheet - Page 32

• Manufacturer Part Number: upd78p058f
• Description: Mos Intergrated Circuit, 8-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

32
Main System Clock Oscillator Characteristics (T
Notes 1. Only the oscillator characteristics are shown. See the AC characteristics for instruction execution times.
Cautions 1. When the main system clock oscillator is used, the following should be noted concerning wiring
Ceramic resonator
Crystal resonator
External clock
Resonator
2. This is the time required for oscillation to stabilize after a reset or STOP mode release.
2. When the main system clock is stopped and the device is operating on the subsystem clock,
in the area in the figure enclosed by broken lines to prevent the influence of wiring capacitance,
etc.
• The wiring should be kept as short as possible.
• No other signal lines should be crossed.
• Keep away from lines carrying a high fluctuating current.
• The oscillator capacitor grounding point should always be at the same potential as V
• Do not connect to a ground pattern carrying a high current.
• A signal should not be taken from the oscillator.
wait until the oscillation stabilization time has been secured by the program before switching
back to the main system clock.
PD74HCU04
Recommended
X2
X2
C2
C2
X2
Circuit
X1
X1
C1
C1
X1
V
V
PP
PP
Oscillation frequency
(f
Oscillation stabilization
time
Oscillation frequency
(f
Oscillation stabilization
time
X1 input frequency
(f
X1 input high-/low-level
width (t
X
X
X
)
)
)
Note 1
Note 1
Note 1
Note 2
Note 2
Parameter
XH
/t
XL
)
A
= –40 to +85 C, V
V
After V
oscillation voltage range
V
DD
DD
= Oscillation voltage range
= 4.5 to 6.0 V
DD
Test Conditions
has reached MIN. of
DD
= 2.7 to 6.0 V)
MIN. TYP. MAX. Unit
1.0
1.0
1.0
85
500
PD78P058F
5.0
5.0
5.0
10
30
4
SS
MHz
MHz
MHz
ms
ms
ns
.