Microchip Technology MA330011 Data Sheet
dsPIC33F
DS70165E-page 208
Preliminary
©
2007 Microchip Technology Inc.
FIGURE 17-5:
SPI SLAVE, FRAME MASTER CONNECTION DIAGRAM
FIGURE 17-6:
SPI SLAVE, FRAME SLAVE CONNECTION DIAGRAM
EQUATION 17-1:
RELATIONSHIP BETWEEN DEVICE AND SPI CLOCK SPEED
TABLE 17-1:
SAMPLE SCKx FREQUENCIES
F
CY
= 40 MHz
Secondary Prescaler Settings
1:1
2:1
4:1
6:1
8:1
Primary Prescaler Settings
1:1
Invalid
Invalid
10000
6666.67
5000
4:1
10000
5000
2500
1666.67
1250
16:1
2500
1250
625
416.67
312.50
64:1
625
312.5
156.25
104.17
78.125
F
CY
= 5 MHz
Primary Prescaler Settings
1:1
5000
2500
1250
833
625
4:1
1250
625
313
208
156
16:1
313
156
78
52
39
64:1
78
39
20
13
10
Note:
SCKx frequencies shown in kHz.
SDOx
SDIx
dsPIC33F
Serial Clock
SSx
SCKx
Frame Sync
Pulse
Pulse
SDIx
SDOx
PROCESSOR 2
SSx
SCKx
(SPI Slave, Frame Slave)
SDOx
SDIx
dsPIC33F
Serial Clock
SSx
SCKx
Frame Sync
Pulse
Pulse
SDIx
SDOx
PROCESSOR 2
SSx
SCKx
(SPI Master, Frame Slave)
Primary Prescaler * Secondary Prescaler
F
CY
F
SCK
=