PIC16F1934_11 Datasheet, PDF (409/472 Pages) Microchip Technology – 28/40/44-Pin Flash-Based, 8-Bit CMOS Microcontrollers

PIC16(L)F1934/6/7
TABLE 30-16: I²C™ BUS DATA REQUIREMENTS
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 100 kHz mode
—
250 ns
time
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 100 kHz mode
250
—
ns (Note 2)
time
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.
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DS41364E-page 409