PIC18F2221_1 Datasheet, PDF (363/402 Pages) Microchip Technology – Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

PIC18F2221/2321/4221/4321 FAMILY
FIGURE 27-15: EXAMPLE SPI SLAVE MODE TIMING (CKE = 0)
SS
70
SCK
(CKP = 0)
83
71
72
SCK
(CKP = 1)
SDO
SDI
80
MSb
bit 6 - - - - - -1
MSb In
74
73
75, 76
bit 6 - - - -1
LSb
77
LSb In
TABLE 27-16: EXAMPLE SPI MODE REQUIREMENTS (SLAVE MODE TIMING, CKE = 0)
Param
No.
Symbol
Characteristic
Min
Max Units Conditions
70
TssL2scH, SS ↓ to SCK ↓ or SCK ↑ Input
TssL2scL
3 TCY
—
71
TscH
SCK Input High Time
Continuous 1.25 TCY + 30 —
71A
Single Byte
40
—
72
TscL
SCK Input Low Time
Continuous 1.25 TCY + 30 —
72A
Single Byte
40
—
73
TdiV2scH, Setup Time of SDI Data Input to SCK Edge
TdiV2scL
20
—
73A Tb2b
Last Clock Edge of Byte 1 to the First Clock Edge of Byte 2 1.5 TCY + 40 —
74
TscH2diL, Hold Time of SDI Data Input to SCK Edge
TscL2diL
40
—
75
TdoR
SDO Data Output Rise Time
PIC18FXXXX
—
25
PIC18LFXXXX
45
76
TdoF
SDO Data Output Fall Time
—
25
77
TssH2doZ SS ↑ to SDO Output High-Impedance
10
50
80
TscH2doV, SDO Data Output Valid after SCK Edge PIC18FXXXX
—
50
TscL2doV
PIC18LFXXXX
100
83
TscH2ssH, SS ↑ after SCK edge
TscL2ssH
1.5 TCY + 40 —
Note 1: Requires the use of Parameter #73A.
2: Only if Parameter #71A and #72A are used.
ns
ns
ns (Note 1)
ns
ns (Note 1)
ns
ns (Note 2)
ns
ns
ns VDD = 2.0V
ns
ns
ns
ns VDD = 2.0V
ns
© 2009 Microchip Technology Inc.
DS39689F-page 363