Datasheet
2010-2012 Microchip Technology Inc. DS41452C-page 309
PIC16(L)F1516/7/8/9
FIGURE 25-21: I
2
C™ BUS DATA TIMING
TABLE 25-14: I
2
C™ 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
SSP module 1.5T
CY ——
SP101* T
LOW 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 ——
SP102* T
R SDAx and SCLx
rise time
100 kHz mode — 1000 ns
400 kHz mode 20 + 0.1C
B 300 ns CB is specified to be from
10-400 pF
SP103* T
F SDAx and SCLx fall
time
100 kHz mode — 250 ns
400 kHz mode 20 + 0.1C
B 250 ns CB is specified to be from
10-400 pF
SP106* T
HD:DAT Data input hold time 100 kHz mode 0 — ns
400 kHz mode 0 0.9
s
SP107* T
SU:DAT Data input setup
time
100 kHz mode 250 — ns (Note 2)
400 kHz mode 100 — ns
SP109* T
AA Output valid from
clock
100 kHz mode — 3500 ns (Note 1)
400 kHz mode — — ns
SP110* T
BUF 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
SP111 C
B 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 SCLx to avoid unintended generation of Start or Stop conditions.
2: A Fast mode (400 kHz) I
2
C™ bus device can be used in a Standard mode (100 kHz) I
2
C bus system, but
the requirement T
SU: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 T
R max. + TSU:DAT = 1000 + 250 = 1250 ns (according
to the Standard mode I
2
C bus specification), before the SCLx line is released.
Note: Refer to Figure 25-5 for load conditions.
SP90
SP91
SP92
SP100
SP101
SP103
SP106
SP107
SP109
SP109
SP110
SP102
SCLx
SDAx
In
SDAx
Out