Samsung C8278X ユーザーズマニュアル
S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X
ELECTRICAL
DATA
17-7
Table 17-5. A.C. Electrical Characteristics
(T
A
=
− 25
°
C to + 85
°
C, V
DD
= 2.0 V to 3.6 V)
Parameter Symbol
Conditions
Min
Typ
Max
Unit
External SCK source
1,000
−
−
ns
SCK cycle time
t
KCY
Internal SCK source
1,000
External SCK source
500
SCK high, low width
t
KH
, t
KL
Internal SCK source
t
KCY
/2
−50
External SCK source
250
SI setup time to SCK high
t
SIK
Internal SCK source
250
t
KSI
External SCK source
400
SI hold time to SCK high
Internal SCK source
400
External SCK source
−
−
300 ns
Output delay for SCK to SO
t
KSO
Internal SCK source
250
Interrupt input, High, Low width
t
INTH
,
t
INTL
All interrupt
V
V
DD
= 3 V
500 700
−
ns
nRESET input Low width
t
RSL
Input
V
V
DD
= 3 V
10
−
−
µs
t
INTH
t
INTL
0.8 V
DD
0.2 V
DD
NOTE:
The unit t
CPU
means one CPU clock period.
External
Interrupt
Figure 17-3. Input Timing for External Interrupts