LC786960E
Power on and Reset control
Attention when power on
The RESB pin must be set to “Low” level to initialize the operating state of internal flash memory.
If the power is on during the RESB pin is “High” level, this LSI may operate incorrectly because the internal flash
memory is not initialized. In this case, this LSI is not initialized even if a low level supplied to RESB pin.
Therefore, the RESB pin must be set to “Low” level when power is first supplied.
You may input the voltage of 3.6V or less to each input pin when the power supply is off. However, it is necessary
to supply a regulated voltage to the power supply pin beforehand when more than 3.6V voltage is input to the 5V
tolerant input pins.
Power ON/Power Down/Reset timing
3.3V Power
V
1
DD
vBOT
0V
tPWD
3.3V Power
V
1
DD
tRESW1
tRESW2
RESB
During normal operation
(Oscillation clock is valid)
Power on stage
Parameter
Symbol
tPWD
min
10
0
typ
max
unit
ms
V
Power down time
Power down voltage
vBOT
0.2
Reset time (Power on)
Reset time (Normal) (*1)
tRESW1
tRESW2
20
1
ms
ms
*1: The specification of tRESW2 above is the time defined while steady the X16 clock and having oscillated.
When the X16 clock has been stopped by the command etc. , the specification of tRESW2 could be larger than the
value shown above, because it takes time that the X16 oscillator becomes stable.
No.A2080-12/24
SANYO [ SANYO SEMICON DEVICE ]
