UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 657

• Manufacturer Part Number: UPD78F0537DGA(T)-9EV-A
• Description: 8BIT MCU, 128K FLASH, 7KB RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F0537DGA(T)-9EV-A

• Controller Family/series: UPD78
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

Internal Oscillator Characteristics
(T
Note Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time.
Remark RSTS: Bit 7 of the internal oscillation mode register (RCM))
XT1 Oscillator Characteristics
(T
Note Indicates only oscillator characteristics. Refer to AC Characteristics for instruction execution time.
Cautions 1. When using the XT1 oscillator, wire as follows in the area enclosed by the broken lines in the
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
Resonator
= −40 to +110°C, 2.7 V ≤ V
= −40 to +110°C, 2.7 V ≤ V
2. The XT1 oscillator is designed as a low-amplitude circuit for reducing power consumption, and
oscillation themselves or apply to the resonator manufacturer for evaluation.
Resonator
CHAPTER 31 ELECTRICAL SPECIFICATIONS ((A2) GRADE PRODUCTS: T
above figure 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.
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.
Recommended Circuit
V
SS
C4
Rd
XT2
C3
XT1
DD
DD
Internal high-speed
oscillation clock frequency
(f
Internal low-speed
oscillation clock frequency
(f
RH
RL
= EV
= EV
)
)
Note
DD
DD
Parameter
XT1 clock oscillation
frequency (f
≤ 5.5 V, V
≤ 5.5 V, V
User’s Manual U17260EJ6V0UD
Parameter
XT
SS
SS
)
Note
= EV
= EV
RSTS = 1
RSTS = 0
SS
SS
= AV
= AV
SS
SS
Conditions
= 0 V)
= 0 V)
Conditions
(A2) grade products: T
A
= −40 to +110°C)
MIN.
MIN.
2.48
216
7.6
32
32.768
TYP.
TYP.
240
A
8.0
5.6
= −40 to +110°C
SS
MAX.
MAX.
9.86
264
8.4
35
.
MHz
MHz
Unit
kHz
Unit
kHz
657