參數(shù)資料
型號: CXP85848AS
廠商: Sony Corporation
英文描述: MICROCONTROLLER|8-BIT|SPC700 CPU|CMOS|SDIP|64PIN|PLASTIC
中文描述: 單片機(jī)| 8位| SPC700 CPU的|的CMOS | SDIP接插| 64管腳|塑料
文件頁數(shù): 13/22頁
文件大小: 277K
代理商: CXP85848AS
– 13 –
CXP85840A/85848A/85856A
12.0
200
20
AC Characteristics
(1) Clock timing
1
Indicates three values according to the contents of the clock control register (CLC: 00FE
h
) 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”)
37.5
t
sys
1
+ 50
System clock frequency
System clock input pulse
width
System clock input rise
and fall times
Event count input clock
pulse width
Event count input clock
rise and fall times
f
C
t
XL
,
t
XH
t
CR
,
t
CF
t
EH
,
t
EL
t
ER
,
t
EF
XTAL
EXTAL
EXTAL
EXTAL
EC
EC
MHz
ns
ns
ns
ms
Item
Symbol
Pins
Conditions
Typ.
Max.
Unit
Fig. 1, Fig. 2
Fig. 1, Fig. 2
External clock drive
Fig. 1, Fig. 2
External clock drive
Fig. 3
Fig. 3
(Ta = –20 to +75°C, V
DD
= 4.5 to 5.5V, Vss = 0V reference)
Fig. 1. Clock timing
EXTAL
t
XH
t
XL
t
CF
t
CR
0.4V
V
DD
– 0.4V
1/fc
Fig. 2. Clock applied conditions
AAAAA
C
1
AAAAA
AAAAA
AAAAA
AAAAA
AAAAA
Ceramic oscillation
External clock
OPEN
C
2
Fig. 3. Event count clock timing
EC
t
EH
t
EL
t
EF
t
ER
0.2V
DD
0.8V
DD
Min.
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