CHAPTER 16 ELECTRICAL SPECIFICATIONS
637
User’s Manual U15195EJ5V0UD
Notes 1.
Be sure not to exceed the absolute maximum ratings (MAX. value) of each power supply voltage.
2.
Make sure that the following conditions of the V
PP
voltage application timing are satisfied when the
flash memory is written.
•
When supply voltage rises
V
PP
must exceed V
DD
10
µ
s or more (2 ms when the power supply voltage is stepped down via a
regulator) after V
DD
has reached the lower-limit value (4.5 V) of the operating voltage range (see a in
the figure below).
•
When supply voltage drops
V
DD
must be lowered 10
µ
s or more after V
PP
falls below the lower-limit value (4.5 V) of the operating
voltage range of V
DD
(see b in the figure below).
4.5 V
V
DD
0 V
0 V
V
PP
4.5 V
a
b
Cautions 1. Do not directly connect output (or I/O) pins of IC products to each other, or to V
DD
, V
CC
,
and GND. Open drain pins or open collector pins, however, can be directly connected
to each other. Direct connection of the output pins between an IC product and an
external circuit is possible, if the output pins can be set to the high-impedance state and
the output timing of the external circuit is designed to avoid output conflict.
2. Product quality may suffer if the absolute maximum rating is exceeded even
momentarily for any parameter. That is, the absolute maximum ratings are rated values
at which the product is on the verge of suffering physical damage, and therefore the
product must be used under conditions that ensure that the absolute maximum ratings
are not exceeded. The ratings and conditions shown below for DC characteristics and
AC characteristics are within the range for normal operation and quality assurance.
Capacitance (T
A
= 25
°
C, REGIN = V
DD
= RV
DD
= V
SS3
= V
SS
= CV
SS
= 0 V)
Parameter Symbol
Conditions
MIN.
TYP.
MAX.
Unit
Input capacitance
C
I
15
pF
I/O capacitance
C
IO
15
pF
Output capacitance
C
O
f
C
= 1 MHz
Unmeasured pins returned to 0 V.
15
pF
Operating Conditions
Power Supply Voltage
Operation Mode
Internal System Clock Frequency (f
XX
)
Operating Ambient
Temperature (T
A
)
REGIN V
DD
= RV
DD
Direct mode
4 to 25 MHz
–40 to +85
°
C 3.3
V
±
0.3 V
5.0 V
±
0.5 V
PLL mode
4 to 40 MHz
–40 to +85
°
C 3.3
V
±
0.3 V
5.0 V
±
0.5 V
Caution When interfacing to the external devices using the CLKOUT signal, make the internal system clock
frequency (f
XX
) 32 MHz or lower.