參數(shù)資料
型號: X1209
英文描述: Real Time Clock/Calendar with Event/Timestamp Detection & Alarms(帶有事件/時間標記檢測與報警功能的實時時鐘/日歷)
中文描述: 實時時鐘/日歷的事件/時間戳檢測
文件頁數(shù): 7/27頁
文件大?。?/td> 511K
代理商: X1209
7 of 27
REV 3.0 2/11/04
www.xicor.com
Preliminary Information
X1209
AC Specifications - Serial Bus
(T
A
= -40°C to +85°C, V
CC
= +2.7V to +5.5V, unless otherwise specified.)
Symbol
Parameter
f
SCL
SCL Clock Frequency
t
IN
Pulse width Suppression Time at inputs
t
AA
SCL LOW to SDA Data Out Valid
t
BUF
Time the bus must be free before a new transmission can start
t
LOW
Clock LOW Time
t
HIGH
Clock HIGH Time
t
SU:STA
Start Condition Setup Time
t
HD:STA
Start Condition Hold Time
t
SU:DAT
Data In Setup Time
t
HD:DAT
Data In Hold Time
t
SU:STO
Stop Condition Setup Time
t
DH
Data Output Hold Time
t
R
SDA and SCL Rise Time
t
F
SDA and SCL Fall Time
Cb
Capacitive load for each bus line
Notes:
(1) This parameter is not 100% tested.
(2) Cb = total capacitance of one bus line in pF.
TIMING DIAGRAMS
Bus Timing
Min.
Max.
400
Units
kHz
ns
μ
s
μ
s
μ
s
μ
s
μ
s
μ
s
ns
μ
s
μ
s
ns
ns
ns
pF
50
(1)
0.9
1.3
1.3
0.6
0.6
0.6
100
0
0.6
50
20 +.1Cb
(1)(2)
20 +.1Cb
(1)(2)
300
300
400
t
SU:STO
t
DH
t
HIGH
t
SU:STA
t
HD:STA
t
HD:DAT
t
SU:DAT
SCL
SDA IN
SDA
OUT
t
F
t
LOW
t
BUF
t
AA
t
R
相關PDF資料
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