UPD789304 Datasheet, PDF (53/64 Pages) NEC – 8-BIT SINGLE-CHIP MICROCONTROLLER

µPD789304, 789306, 789314, 789316
Oscillation Stabilization Wait Time (TA = –40 to +85°C, VDD = 1.8 to 5.5 V)
Parameter
Symbol
Conditions
Oscillation stabilization wait tWAIT
time^{Note 1} (ceramic/crystal
oscillation)
Release by RESET
Release by interrupt
Oscillation stabilization wait tWAIT
time (RC oscillation)
Release by RESET
Release by interrupt
MIN.
TYP. MAX.
Unit
2¹⁵/fX
s
Note 2
s
2⁷/fCC
s
2⁷/fCC
s
Notes 1.
2.
Use a resonator whose oscillation stabilizes within the oscillation stabilization wait time.
Selection of 2¹²/fX, 2¹⁵/fX, or 2¹⁷/fX is possible with bits 0 to 2 (OSTS0 to OSTS2) of the oscillation
stabilization time select register (OSTS).
Remarks 1. fX: Main system clock oscillation frequency (ceramic/crystal oscillation)
2. fCC: Main system clock oscillation frequency (RC oscillation)
Data Sheet U14384EJ1V0DS
53