PIC18F2221_1 Datasheet, PDF (361/402 Pages) Microchip Technology – Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

PIC18F2221/2321/4221/4321 FAMILY
FIGURE 27-13:
SS
EXAMPLE SPI MASTER MODE TIMING (CKE = 0)
SCK
(CKP = 0)
SCK
(CKP = 1)
SDO
SDI
78
79
80
MSb
MSb In
74
73
79
bit 6 - - - - - -1
75, 76
bit 6 - - - -1
78
LSb
LSb In
TABLE 27-14: EXAMPLE SPI MODE REQUIREMENTS (MASTER MODE, CKE = 0)
Param
No.
Symbol
Characteristic
Min
Max Units Conditions
73
TdiV2scH, Setup Time of SDI Data Input to SCK Edge
TdiV2scL
20
— ns
73A Tb2b
Last Clock Edge of Byte 1 to the 1st Clock Edge 1.5 TCY + 40 — ns
of Byte 2
74
TscH2diL, Hold Time of SDI Data Input to SCK Edge
TscL2diL
40
— ns
75
TdoR
SDO Data Output Rise Time PIC18FXXXX
—
25 ns
PIC18LFXXXX
—
45 ns VDD = 2.0V
76
TdoF
SDO Data Output Fall Time
—
25 ns
78
TscR
SCK Output Rise Time
PIC18FXXXX
—
25 ns
79
TscF
SCK Output Fall Time
PIC18LFXXXX
—
—
45 ns VDD = 2.0V
25 ns
80
TscH2doV, SDO Data Output Valid after PIC18FXXXX
TscL2doV SCK Edge
PIC18LFXXXX
—
50 ns
—
100 ns VDD = 2.0V
© 2009 Microchip Technology Inc.
DS39689F-page 361