Datasheet
78K0/Ix2 CHAPTER 28 ELECTRICAL SPECIFICATIONS
R01UH0010EJ0500 Rev.5.00 712
Feb 28, 2012
Caution The pins mounted depend on the product. Refer to Caution 2 at the beginning of this chapter.
28.5.7 Supply Voltage Rise Time
(T
A = 40 to +105C, VSS = 0 V)
Parameter Symbol Conditions MIN. TYP. MAX. Unit
Maximum time to rise to 2.7 V (VDD (MIN.))
Note
(V
DD: 0 V 2.7 V)
t
PUP1
LVI default start function stopped is
set (LVISTART (Option Byte) = 0),
when RESET input is not used
5.4 ms
Maximum time to rise to 2.7 V (VDD (MIN.))
Note
(releasing RESET input
VDD: 2.7 V)
t
PUP2
LVI default start function stopped is
set (LVISTART (Option Byte) = 0),
when RESET input is used
1.9 ms
Note Make sure to raise the power supply in a shorter time than this.
Caution The operation guaranteed range is 2.7 V V
DD 5.5 V. If the rise of the voltage to reach 2.7 V after
turning on the power is more gradual than 0.5 V/ms (MIN.), perform one of the following operations.
Input a low level to the RESET pin until 2.7 V is reached after turning on the power.
Set the LVI default start function to operate (LVISTART = 1) using the option byte and perform a wait
processing until the supply voltage rises from 1.91 V (TYP.) to 2.7 V.
Supply Voltage Rise Time Timing
When RESET pin input is not used
When RESET pin input is used (when external reset is
released by the RESET pin, after POC has been released)
Supply voltage
(V
DD
)
Time
2.7 V
0 V
POC internal
signal
t
PUP1
Supply voltage
(V
DD)
Time
2.7 V
0 V
POC internal
signal
RESET pin
Internal reset
signal
tPUP2