參數(shù)資料
型號(hào): CXP85460S
廠(chǎng)商: Sony Corporation
元件分類(lèi): 8位微控制器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁(yè)數(shù): 17/21頁(yè)
文件大小: 256K
代理商: CXP85460S
– 17 –
CXP85452/85460
(6) I
2
C bus timing
(Ta = –20 to +75°C, V
DD
= 4.5 to 5.5V, Vss = 0V reference)
Item
SCL clock frequency
Bus-free time before starting transfer
Hold time for starting transfer
Clock low level width
Clock high level width
Set-up time for repeated transfers
Data hold time
Data set-up time
SDA, SCL rise time
SDA, SCL fall time
Set-up time for transfer completion
1
For the data hold time, the SCL rise time (300ns Max.) is not considered so that 300ns should be exceeded.
f
SLC
t
BUF
t
HD; STA
t
LOW
t
HIGH
t
SU; STA
t
HD; DAT
t
SU; DAT
t
R
t
F
t
SU; STO
SCL
SDA, SCL
SDA, SCL
SCL
SCL
SDA, SCL
SDA, SCL
SDA, SCL
SDA, SCL
SDA, SCL
SDA, SCL
0
4.7
4.0
4.7
4.0
4.7
0
1
250
4.7
100
1
300
kHz
μs
μs
μs
μs
μs
μs
ns
μs
ns
μs
Symbol
Pin
Condition
Min.
Max.
Unit
Fig. 9. I
2
C bus transfer data timing
P
St
t
SU; STO
t
SU; STA
t
HD; STA
t
SU; DAT
t
HIGH
t
HD; DAT
t
F
t
R
t
LOW
t
HD; STA
S
P
t
BUF
SDA
SCL
Fig. 10. I
2
C device recommended circuit
I
2
C
device
I
2
C
device
R
S
R
S
R
S
R
S
R
P
R
P
SDA0
(or SDA1)
SCL0
(or SCL1)
A pull-up resistor (Rp) must be connected to SDA0 (or SDA1), and SCL0 (or SCL1).
The SDA0 (or SDA1) and SCL0 (or SCL1) series resistance (Rs = 300
or less) can be used to reduce spike
noise caused by CRT flashover.
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