UPD78F1154GK-GAK-AX NEC, UPD78F1154GK-GAK-AX Datasheet - Page 71

• 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

Internal Oscillator Characteristics
(T
Note
XT1 Oscillator Characteristics
(T
Note
Remark For the resonator selection and oscillator constant, customers are requested to either evaluate the
8 MHz internal
oscillator
240 kHz internal
oscillator
Crystal resonator
A
A
Cautions 1. When using the XT1 oscillator, wire as follows in the area enclosed by the broken lines in the
= −40 to +85°C, 1.8 V ≤ V
Oscillators
= −40 to +85°C, 1.8 V ≤ V
Resonator
Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time.
Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time.
oscillation themselves or apply to the resonator manufacturer for evaluation.
2. The XT1 oscillator is designed as a low-amplitude circuit for reducing power consumption,
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.
and is more prone to malfunction due to noise than the X1 oscillator. Particular care is
therefore required with the wiring method when the XT1 clock is used.
Internal high-
speed oscillation
clock frequency
(f
Internal low-speed
oscillation clock
frequency (f
IH
Recommended
V
)
Parameters
Note
SS
Rd
C4
Circuit
XT2
C3
IL
)
XT1
DD
DD
= EV
= EV
No temperature correction
Temperature correction
2.7 V ≤ V
1.8 V ≤ V
XT1 clock oscillation
frequency (f
Preliminary Product Information U17892EJ2V0PM
DD
DD
≤ 5.5 V, V
DD
DD
≤ 5.5 V, V
Items
≤ 5.5 V
< 2.7 V
XT
)
Note
SS
SS
Conditions
= EV
= EV
2.7 V ≤ V
1.8 V ≤ V
2.7 V ≤ V
1.8 V ≤ V
SS
SS
= AV
= AV
Conditions
DD
DD
DD
DD
≤ 5.5 V
< 2.7 V
≤ 5.5 V
< 2.7 V
SS
SS
= 0 V)
= 0 V)
MIN.
MIN.
7.6
7.8
32.768
TYP.
TYP.
TBD
240
8.0
8.0
78K0R/KF3
MAX.
MAX.
8.4
8.0
8.2
8.0
SS
.
MHz
MHz
MHz
MHz
Unit
Unit
kHz
kHz
kHz
71