PIC16F872 Datasheet, PDF (139/160 Pages) Microchip Technology – 28-Pin, 8-Bit CMOS FLASH Microcontroller

PIC16F872
TABLE 14-6: SPI MODE REQUIREMENTS
Param
No.
Sym
Characteristic
Min
Typ† Max Units Conditions
70* TssL2scH, SS↓ to SCK↓ or SCK↑ input
TssL2scL
TCY
—
—
ns
71* TscH
SCK input high time (slave mode)
TCY + 20
—
—
ns
72* TscL
SCK input low time (slave mode)
TCY + 20
—
—
ns
73* TdiV2scH, Setup time of SDI data input to SCK edge
TdiV2scL
100
—
—
ns
74* TscH2diL, Hold time of SDI data input to SCK edge
TscL2diL
100
—
—
ns
75* TdoR
SDO data output rise time
Standard(F)
—
Extended(LF)
—
10
25 ns
25
50 ns
76* TdoF
SDO data output fall time
—
10
25 ns
77* TssH2doZ SS↑ to SDO output hi-impedance
10
—
50 ns
78* TscR
SCK output rise time (master mode) Standard(F)
—
Extended(LF)
—
10
25 ns
25
50 ns
79* TscF
SCK output fall time (master mode)
—
10
25 ns
80* TscH2doV, SDO data output valid after SCK Standard(F)
—
TscL2doV edge
Extended(LF)
—
—
50 ns
— 145
81* TdoV2scH, SDO data output setup to SCK edge
TdoV2scL
TCY
—
—
ns
82* TssL2doV SDO data output valid after SS↓ edge
—
—
50 ns
83* TscH2ssH, SS ↑ after SCK edge
TscL2ssH
1.5TCY + 40 —
—
ns
* These parameters are characterized but not tested.
† Data in "Typ" column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
FIGURE 14-14: I²C BUS START/STOP BITS TIMING
SCL
SDA
91
90
93
92
START
Condition
STOP
Condition
Note: Refer to Figure 14-3 for load conditions.
TABLE 14-7: I²C BUS START/STOP BITS REQUIREMENTS
Parameter Sym Characteristic
No.
Min Typ Max Units
Conditions
90
TSU:STA START condition 100 kHz mode
4700 — —
Only relevant for repeated START
Setup time
400 kHz mode
600 — —
ns _condition
91
THD:STA START condition 100 kHz mode
4000 — —
After this period the first clock
Hold time
400 kHz mode
600 — —
ns _{pulse is generated}
92
TSU:STO STOP condition
100 kHz mode
4700 — —
ns
Setup time
400 kHz mode
600 — —
93
THD:STO STOP condition
100 kHz mode
4000 — —
ns
Hold time
400 kHz mode
600 — —
© 1999 Microchip Technology Inc.
Preliminary
DS30221A-page 139