PIC18LF24K Datasheet, PDF (563/594 Pages) –

PIC18(L)F26/45/46K40
TABLE 37-25: I²C BUS DATA REQUIREMENTS
Standard Operating Conditions (unless otherwise stated)
Param.
No.
Symbol
Characteristic
Min.
Max. Units
Conditions
SP100*
SP101*
SP102*
SP103*
SP106*
SP107*
SP109*
SP110*
SP111
*
Note 1:
2:
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
SSP module
1.5TCY
—
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
SSP module
1.5TCY
—
TR
SDA and SCL rise 100 kHz mode
—
1000 ns
time
400 kHz mode
20 + 0.1CB 300
ns CB is specified to be from
10-400 pF
TF
SDA and SCL fall time 100 kHz mode
—
250
ns
400 kHz mode
20 + 0.1CB 250
ns CB is specified to be from
10-400 pF
THD:DAT Data input hold time 100 kHz mode
0
—
ns
400 kHz mode
0
0.9
s
TSU:DAT Data input setup time 100 kHz mode
250
—
ns (Note 2)
400 kHz mode
100
—
ns
TAA
Output valid from
100 kHz mode
clock
400 kHz mode
—
3500 ns (Note 1)
—
—
ns
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
CB
Bus capacitive loading
—
400
pF
These parameters are characterized but not tested.
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.
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.
 2016 Microchip Technology Inc.
Preliminary
DS40001816C-page 563