PIC16F72-E Datasheet, PDF (105/136 Pages) Microchip Technology – 28-Pin, 8-Bit CMOS FLASH Microcontoller with A/D Converter

PIC16F72
TABLE 14-8: I²C BUS DATA REQUIREMENTS
Param
No.
Symbol
Characteristic
Min
Max Units
Conditions
100* THIGH Clock High Time 100 kHz mode
4.0
— μs Device must operate at a
minimum of 1.5 MHz
400 kHz mode
0.6
— μs Device must operate at a
minimum of 10 MHz
SSP Module
1.5 TCY
—
101* TLOW
Clock Low Time 100 kHz mode
4.7
— μs Device must operate at a
minimum of 1.5 MHz
400 kHz mode
1.3
— μs Device must operate at a
minimum of 10 MHz
SSP Module
1.5 TCY
—
102* TR
SDA and SCL Rise 100 kHz mode
—
1000
Time
400 kHz mode 20 + 0.1 CB 300
ns
ns CB is specified to be from
10 - 400 pF
103* TF
SDA and SCL Fall 100 kHz mode
—
300
Time
400 kHz mode 20 + 0.1 CB 300
ns
ns CB is specified to be from
10 - 400 pF
90* TSU:STA START Condition 100 kHz mode
4.7
Setup Time
400 kHz mode
0.6
— μs Only relevant for
—
μs ^{Repeated START}
condition
91* THD:STA START Condition 100 kHz mode
4.0
Hold Time
400 kHz mode
0.6
— μs After this period, the first
—
μs ^{clock pulse is generated}
106* THD:DAT Data Input Hold 100 kHz mode
0
Time
400 kHz mode
0
—
ns
0.9 μs
107* TSU:DAT Data Input Setup 100 kHz mode
250
Time
400 kHz mode
100
—
ns (Note 2)
—
ns
92* TSU:STO STOP Condition 100 kHz mode
4.7
Setup Time
400 kHz mode
0.6
— μs
— μs
109* TAA
Output Valid from 100 kHz mode
Clock
400 kHz mode
—
3500 ns (Note 1)
—
—
ns
110* TBUF
Bus Free Time
100 kHz mode
4.7
400 kHz mode
1.3
— μs Time the bus must be free
—
μs ^{before a new transmission}
can start
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.
© 2007 Microchip Technology Inc.
DS39597C-page 103