UPD78F4046GC-3B9 NEC, UPD78F4046GC-3B9 Datasheet - Page 22

• Manufacturer Part Number: UPD78F4046GC-3B9
• Description: 16-BIT SINGLE-CHIP MICROCONTROLLER
• Manufacturer: NEC

Flash Memory Specifications (T
Oscillator Characteristics (T
22
V
V
Number of rewrites
Ceramic resonator or
crystal resonator
External clock
DD
PP
Note
Note
Caution
Remark For the resonator selection and oscillator constant, customers are requested to either evaluate the
supply voltage
supply voltage
Resonator
Parameter
If the number of flash memory rewrites exceeds 10, operation is not guaranteed.
When the EXTC bit of the oscillation stabilization time specification register (OSTS) = 0. Input the reverse
phase clock of pin X1 to pin X2 when the EXTC bit = 1.
oscillation themselves or apply to the resonator manufacturer for evaluation.
When using the system clock oscillator, wire as follows in the area enclosed by the broken lines
in the above figures to avoid an adverse effect from wiring capacitance.
• Keep the wiring length as short as possible.
• Do not cross the wiring with the other signal lines. Do not route the wiring near a signal line
• Always make the ground point of the oscillator capacitor the same potential as V
• Do not fetch signals from the oscillator.
through which a high fluctuating current flows.
ground the capacitor to a ground pattern through which a high current flows.
Note
Recommended Circuit
V
Symbol
A
V
V
X1
SS
DD
PP
= –10 to +70˚C, V
C1
A
HCMOS inverter
= +10 to +40˚C (rewriting), T
X1
V
Open
PP
C2
X2
high-voltage detection
Data Sheet U11447EJ2V0DS00
X2
Note
DD
Conditions
= 4.5 to 5.5 V, V
Oscillation frequency (f
X1 input frequency (f
X1 input rise/fall time
X1 input high-/low-level
width
Parameter
A
= –10 to +70˚C (other than rewriting))
SS
= 0 V)
MIN.
4.5
9.7
X
10
)
XX
)
TYP.
10.0
MIN.
20
8
8
0
MAX.
MAX.
10.3
105
5.5
32
32
5
PD78F4046
SS
. Do not
Times
MHz
MHz
Unit
Unit
ns
ns
V
V