UPD78F0535GB(T)-UEU-A NEC, UPD78F0535GB(T)-UEU-A Datasheet - Page 153
UPD78F0535GB(T)-UEU-A
Manufacturer Part Number
UPD78F0535GB(T)-UEU-A
Description
8BIT MCU, 60K FLASH, 3KB RAM, LQFP
Manufacturer
NEC
Datasheet
1.UPD78F0535GBT-UEU-A.pdf
(773 pages)
Specifications of UPD78F0535GB(T)-UEU-A
Controller Family/series
UPD78
No. Of I/o's
55
Ram Memory Size
3KB
Cpu Speed
20MHz
No. Of Timers
8
No. Of Pwm
RoHS Compliant
Core Size
8bit
Program Memory Size
60KB
Oscillator Type
External, Internal
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Caution
Remark When using the subsystem clock, replace X1 and X2 with XT1 and XT2, respectively. Also, insert
Figure 6-11 shows examples of incorrect resonator connection.
resistors in series on the XT2 side.
1. When using the X1 oscillator and XT1 oscillator, wire as follows in the area enclosed by the
Note that the XT1 oscillator is designed as a low-amplitude circuit for reducing power
consumption.
broken lines in the Figures 6-9 and 6-10 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
• Always make the ground point of the oscillator capacitor the same potential as V
• Do not fetch signals from the oscillator.
(a) Too long wiring
line through which a high fluctuating current flows.
not ground the capacitor to a ground pattern through which a high current flows.
V
Figure 6-11. Examples of Incorrect Resonator Connection (1/2)
SS
X1
CHAPTER 6 CLOCK GENERATOR
X2
User’s Manual U17260EJ6V0UD
V
SS
(b) Crossed signal line
X1
PORT
X2
SS
. Do
153
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