NEC 78K0 User Manual page 539

CHAPTER 30 ELECTRICAL SPECIFICATIONS (STANDARD PRODUCTS, (A) GRADE PRODUCTS)
AC Characteristics
(1) Basic operation
= −40 to +85°C, 2.7 V ≤ V
(T
A
Parameter
Instruction cycle (minimum
instruction execution time)
Note 3
TI000, TI010, TI001 ,
Note 3
TI011 input high-level width,
low-level width
TI50, TI51 input frequency
TI50, TI51 input high-level width,
low-level width
Interrupt input high-level width,
low-level width
Key return input low-level width
RESET low-level width
Notes 1. When the REGC pin is connected to V
2. When the REGC pin is connected directly to V
µ
3. PD780146, 780148, 78F0148, 780146(A), 780148(A), and 78F0148(A) only.
4. Selection of f
sam
or PRM010, PRM011) of prescaler mode registers 00 and 01 (PRM00, PRM01). Note that when selecting
the TI000 or TI001 valid edge as the count clock, f
≤ 5.5 V, 2.7 V ≤ AV
= EV
DD DD
Symbol
T Main X1 input
CY
system clock
clock
operation
Ring-OSC clock
Subsystem clock operation
4.0 V ≤ V ≤ 5.5 V
t ,
TIH0 DD
t
TIL0
2.7 V ≤ V
< 4.0 V
DD
4.0 V ≤ V ≤ 5.5 V
f
TI5 DD
2.7 V ≤ V
< 4.0 V
DD
4.0 V ≤ V ≤ 5.5 V
t ,
TIH5 DD
t
2.7 V ≤ V
TIL5
< 4.0 V
DD
t ,
INTH
t
INTL
4.0 V ≤ V ≤ 5.5 V
t
KR DD
*
2.7 V ≤ V
< 4.0 V
DD
t
RSL
via a capacitor (1
SS
= f , f /4, f /256, or f , f
XP XP XP XP
User's Manual U15947EJ2V0UD
≤ V
, V = EV
REF DD SS
Conditions
4.0 V ≤ V ≤ 5.5 V 0.238
Note 1
DD
4.0 V ≤ V ≤ 5.5 V
Note 2
DD
3.3 V ≤ V
< 4.0 V 0.238
DD
2.7 V ≤ V
< 3.3 V
DD
µ
F: recommended).
.
DD
/16, f /64 is possible using bits 0 and 1 (PRM000, PRM001
XP XP
= f
sam XP.
= AV = 0 V)
SS SS
MIN. TYP. MAX.
16
0.2 16
16
0.4 16
4.17 8.33 16.67
114 122 125
2/f +
sam
Note 4
0.1
2/f +
sam
Note 4
0.2
10
5
50
100
1
50
100
10
Unit
µ
s
µ
s
µ
s
µ
s
µ
s
µ
s
µ
s
µ
s
MHz
MHz
ns
ns
µ
s
ns
ns
µ
s
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