參數(shù)資料
型號: PIC16LF818T-I/SS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 10 MHz, RISC MICROCONTROLLER, PDSO20
封裝: 0.209 INCH, PLASTIC, MO-150, SSOP-20
文件頁數(shù): 49/176頁
文件大?。?/td> 3124K
代理商: PIC16LF818T-I/SS
PIC16F818/819
DS39598E-page 140
2004 Microchip Technology Inc.
TABLE 15-8:
I2C BUS DATA REQUIREMENTS
Param.
No.
Symbol
Characteristic
Min
Max
Units
Conditions
100*
THIGH
Clock High Time
100 kHz mode
4.0
s
400 kHz mode
0.6
s
SSP Module
1.5 TCY
101*
TLOW
Clock Low Time
100 kHz mode
4.7
s
400 kHz mode
1.3
s
SSP Module
1.5 TCY
102*
TR
SDA and SCL Rise
Time
100 kHz mode
1000
ns
400 kHz mode
20 + 0.1 CB
300
ns
CB is specified to be from
10-400 pF
103*
TF
SDA and SCL Fall
Time
100 kHz mode
300
ns
400 kHz mode
20 + 0.1 CB
300
ns
CB is specified to be from
10-400 pF
90*
TSU:STA
Start Condition
Setup Time
100 kHz mode
4.7
s
Only relevant for Repeated
Start condition
400 kHz mode
0.6
s
91*
THD:STA
Start Condition Hold
Time
100 kHz mode
4.0
s
After this period, the first
clock pulse is generated
400 kHz mode
0.6
s
106*
THD:DAT
Data Input Hold
Time
100 kHz mode
0
ns
400 kHz mode
0
0.9
s
107*
TSU:DAT
Data Input Setup
Time
100 kHz mode
250
ns
(Note 2)
400 kHz mode
100
ns
92*
TSU:STO
Stop Condition
Setup Time
100 kHz mode
4.7
s
400 kHz mode
0.6
s
109*
TAA
Output Valid from
Clock
100 kHz mode
3500
ns
(Note 1)
400 kHz mode
ns
110*
TBUF
Bus Free Time
100 kHz mode
4.7
s
Time the bus must be free
before a new transmission
can start
400 kHz mode
1.3
s
CB
Bus Capacitive Loading
400
pF
*
These parameters are characterized but not tested.
Note 1:
As a transmitter, the device must provide this internal minimum delay time to bridge the undefined region
(min. 300 ns) of the falling edge of SCL to avoid unintended generation of Start or Stop conditions.
2:
A Fast mode (400 kHz) I2C bus device can be used in a Standard mode (100 kHz) I2C bus system but
the requirement, TSU:DAT
≥ 250 ns, must then be met. This will automatically be the case if the device does
not stretch the LOW period of the SCL signal. If such a device does stretch the LOW period of the SCL
signal, it must output the next data bit to the SDA line, TR max. + TSU:DAT = 1000 + 250 = 1250 ns
(according to the Standard mode I2C bus specification), before the SCL line is released.
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