參數(shù)資料
型號: CXP84548
廠商: Sony Corporation
英文描述: CMOS 8-bit Single Chip Microcomputer
中文描述: 的CMOS 8位單片機(jī)
文件頁數(shù): 16/27頁
文件大?。?/td> 387K
代理商: CXP84548
– 16 –
CXP84540/84548
1
t
sys indicates three values according to the contents of the clock control register (CLC: 00FEh) upper 2 bits
(CPU clock selection).
t
sys [ns] = 2000/fc (Upper 2 bits = "00"), 4000/fc (Upper 2 bits = "01"), 16000/fc (Upper 2 bits = "11")
EXTAL
t
XH
t
XL
t
CF
t
CR
0.4V
V
DD
– 0.4V
1/fc
AAAAA
C
1
AAAAA
EXTAL
AAAAA
AAAA
AAAA
EXTAL
AAAA
Ceramic oscillation
XTAL
External clock
XTAL
74HC04
C
2
AC Characteristics
(1) Clock timing
System clock frequency
System clock input pulse width
System clock input
rise time, fall time
Event count input clock
pulse width
Event count input clock
rise time, fall time
f
C
t
XL
,
t
XH
t
CR
,
t
CF
t
EH
,
t
EL
t
ER
,
t
EF
XTAL
EXTAL
EXTAL
EXTAL
EC0
EC1
EC0
EC1
MHz
ns
ns
ns
ns
Item
Symbol
Pin
Conditions
Min.
Unit
Fig. 1, Fig. 2
Fig. 1, Fig. 2
External clock drive
Fig. 1, Fig. 2
External clock drive
Fig. 3
Fig. 3
1
1
15.6
23
t
sys + 50
1
Typ. Max.
28
20
100
20
(Ta = –20 to +75°C, V
DD
= 3.0 to 5.5V, Vss = 0V reference)
Fig. 2. Clock applied conditions
Fig. 1. Clock timing
t
EH
t
TH
t
EL
t
TL
t
EF
t
TF
t
ER
t
TR
0.2V
DD
0.8V
DD
EC0
EC1
Fig. 3. Event count clock timing
V
DD
= 4.5 to 5.5V
V
DD
= 4.5 to 5.5V
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