PIC12F1822-I/ST 데이터 시트보기 (PDF) - Microchip Technology
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PIC12F1822-I/ST Datasheet PDF : 398 Pages
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PIC12F/LF1822/16F/LF1823
TABLE 29-16: I2C™ BUS DATA REQUIREMENTS
Param.
No.
Symbol
Characteristic
Min. Max. Units
Conditions
SP100* THIGH Clock high time
100 kHz mode
4.0
—
s Device must operate at a
minimum of 1.5 MHz
400 kHz mode
0.6
—
s Device must operate at a
minimum of 10 MHz
SSPx module
1.5TCY
—
—
SP101* TLOW Clock low time
100 kHz mode
4.7
—
s Device must operate at a
minimum of 1.5 MHz
400 kHz mode
1.3
—
s Device must operate at a
minimum of 10 MHz
SSPx module
1.5TCY
—
—
SP102* TR
SDAx and SCLx
rise time
100 kHz mode
—
1000
400 kHz mode 20 + 0.1CB 300
ns
ns CB is specified to be from
10-400 pF
SP103* TF
SDAx and SCLx fall 100 kHz mode
—
250
time
400 kHz mode 20 + 0.1CB 250
ns
ns CB is specified to be from
10-400 pF
SP106* THD:DAT Data input hold time 100 kHz mode
0
—
ns
400 kHz mode
0
0.9 s
SP107* TSU:DAT Data input setup 100 kHz mode
250
—
ns (Note 2)
time
400 kHz mode
100
—
ns
SP109* TAA
Output valid from 100 kHz mode
clock
400 kHz mode
—
3500 ns (Note 1)
—
—
ns
SP110* TBUF
Bus free time
100 kHz mode
400 kHz mode
4.7
—
s Time the bus must be free
1.3
—
s before a new transmission
can start
SP111 CB
Bus capacitive loading
—
400 pF
* These parameters are characterized but not tested.
Note 1:
2:
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 SCLx to avoid unintended generation of Start or Stop conditions.
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 SCLx signal. If such a device does stretch the low period of the SCLx sig-
nal, it must output the next data bit to the SDAx line TR max. + TSU:DAT = 1000 + 250 = 1250 ns (according
to the Standard mode I2C bus specification), before the SCLx line is released.
2010 Microchip Technology Inc.
Preliminary
DS41413A-page 363
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