UPD78F1154GK-GAK-AX NEC, UPD78F1154GK-GAK-AX Datasheet - Page 70

• Manufacturer Part Number: UPD78F1154GK-GAK-AX
• Description: 16BIT MCU, 128K FLASH, 8K RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F1154GK-GAK-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 70
• Ram Memory Size: 8192Byte
• Cpu Speed: 20MHz
• No. Of Timers: 9
• No. Of: RoHS Compliant
• Core Size: 16bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

70
X1 Oscillator Characteristics
(T
Note
Remark For the resonator selection and oscillator constant, customers are requested to either evaluate the
Ceramic resonator
Crystal resonator
A
Cautions 1. When using the X1 oscillator, wire as follows in the area enclosed by the broken lines in the
= −40 to +85°C, 1.8 V ≤ V
Resonator
Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time.
oscillation themselves or apply to the resonator manufacturer for evaluation.
2. Since the CPU is started by the internal high-speed oscillation clock after a reset release,
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 through which a high fluctuating current flows.
• Always make the ground point of the oscillator capacitor the same potential as V
• Do not ground the capacitor to a ground pattern through which a high current flows.
• Do not fetch signals from the oscillator.
check the X1 clock oscillation stabilization time using the oscillation stabilization time counter
status register (OSTC) by the user. Determine the oscillation stabilization time of the OSTC
register and oscillation stabilization time select register (OSTS) after sufficiently evaluating
the oscillation stabilization time with the resonator to be used.
Recommended
V
V
SS
SS
C1
C1
Circuit
X1
X1
C2
C2
X2
X2
DD
= EV
X1 clock oscillation
frequency (f
X1 clock oscillation
frequency (f
Preliminary Product Information U17892EJ2V0PM
DD
Parameter
≤ 5.5 V, V
X
X
)
)
Note
Note
SS
= EV
2.7 V ≤ V
1.8 V ≤ V
2.7 V ≤ V
1.8 V ≤ V
SS
= AV
Conditions
DD
DD
DD
DD
≤ 5.5 V
< 2.7 V
≤ 5.5 V
< 2.7 V
SS
= 0 V)
MIN.
2.0
2.0
2.0
2.0
TYP.
MAX.
20.0
20.0
5.0
5.0
78K0R/KF3
SS
.
MHz
MHz
Unit