Datasheet

 1998-2013 Microchip Technology Inc. DS30289C-page 257
PIC17C7XX
FIGURE 20-16: SPI SLAVE MODE TIMING (CKE = 1)
TABLE 20-11: SPI MODE REQUIREMENTS (SLAVE MODE, CKE = 1)
SS
SCK
(CKP = 0)
SCK
(CKP = 1)
SDO
SDI
70
71 72
82
SDI
74
75, 76
MSb BIT6 - - - - - -1 LSb
77
MSb IN BIT6 - - - -1 LSb IN
80
83
Note: Refer to Figure 20-5 for load conditions.
Param.
No.
Symbol Characteristic Min Typ† Max Units Conditions
70 TssL2scH,
TssL2scL
SS
 to SCK or SCK input Tcy — — ns
71 TscH SCK input high time
(Slave mode)
Continuous 1.25T
CY + 30 — — ns
71A Single Byte 40 — — ns (Note 1)
72 TscL SCK input low time
(Slave mode)
Continuous 1.25T
CY + 30 — — ns
72A Single Byte 40 — — ns (Note 1)
73A T
B2B Last clock edge of Byte1 to the 1st clock edge
of Byte2
1.5TCY + 40 — — ns (Note 1)
74 TscH2diL,
TscL2diL
Hold time of SDI data input to SCK edge 100 — — ns
75 TdoR SDO data output rise time — 10 25 ns
76 TdoF SDO data output fall time — 10 25 ns
77 TssH2doZ SS
 to SDO output hi-impedance 10 — 50 ns
80 TscH2doV,
TscL2doV
SDO data output valid after SCK edge — — 50 ns
82 TssL2doV SDO data output valid after SS
 edge — — 50 ns
83 TscH2ssH,
TscL2ssH
SS
 after SCK edge 1.5TCY + 40 — — ns
† Data in "Typ" column is at 5V, 25°C unless otherwise stated.
Note 1: Specification 73A is only required if specifications 71A and 72A are used.