MB91220 Datasheet, PDF (71/88 Pages) Fujitsu Component Limited. – 32-bit Microcontroller

MB91220/S Series
(3) Power-on Conditions
Parameter
Power supply rising
time
Power supply start
voltage
Power supply peak
voltage
Power supply cut-off
time
Symbol Pin name
Condi-
tion
tR
VOFF
VCC
⎯
VON
tOFF
(TA : − 40 °C to + 105 °C; VSS = 0.0 V)
Value
Unit
Min
Max
Remarks
0.05
30
ms
⎯
0.2
V
2.7
⎯
V
50
⎯
ms
Due to the repetitive
operation
VCC
0.2 V
tR
4.5 V
0.2 V
tOFF
0.2 V
Power supply drop time, power supply voltages and external reset input to retain RAM data in MB91220/S
Satisfy the following reset input standard to retain the RAM data used in the single chip mode.
Vcc (V)
Voltage drop time
External reset input standard (INITX)
dropped 4.0 V → 3.5 V
Min 256 tcp
Min 256 tcp
4V
Vcc
3.5 V
4V
3.5 V
INITX
256 tcp
To retain RAM data, enter 256 tcp of INITX or more before dropping VCC to 3.5 V or lower.
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