UPD75216ACW Time Required For Oscillation To Become Stabilized After V - NEC
Manufacturer Part Number
4-BIT SINGLE-CHIP MICROCOMPUTER
MAIN SYSTEM CLOCK OSCILLATOR CHARACTERISTICS (Ta = –40 to +85 C, V
* 1. Refer to RECOMMENDED OSCILLATOR CONSTANTS.
2. Oscillator characteristics only. Refer to the description of AC characteristics for details of instruction execution
3. Time required for oscillation to become stabilized after V
voltage range or STOP mode release.
4. When oscillator frequency is “4.19 < f
If “PCC = 0011” is selected, 1 machine cycle becomes less than 0.95 s, with the result that the specified MIN.
value of 0.95 s cannot be observed.
When the main system clock oscillator is used, the following should be noted concerning wiring in the area
in the figure enclosed by a dotted line to prevent the influence of wiring capacitance, etc.
• The wiring should be kept as short as possible.
• No other signal lines should be crossed. Keep away from lines carrying a high fluctuating current.
• The oscillator capacitor grounding point should always be at the same potential as V
to a ground pattern carrying a high current.
• A signal should not be taken from the oscillator.
minimum value in
stabilization time *3
= 4.5 to 6.0 V
X1 input frequency
X1 input high and low
level widths (t
reaches the minimum value in the oscillation
< – 5.0 MHz”, do not select “PCC = 0011” as instruction execution time.
= 2.7 to 6.0 V )
. Do not connect