PIC24HJ128GP206-I Datasheet, PDF (150/286 Pages) Microchip Technology – High-Performance, 16-Bit Microcontrollers

PIC24HJXXXGPX06/X08/X10
FIGURE 15-5:
SPI SLAVE, FRAME MASTER CONNECTION DIAGRAM
PIC24H
PROCESSOR 2
SDOx
SDIx
SDIx
SCKx
SSx
Serial Clock
SDOx
SCKx
SSx
Frame Sync
Pulse
FIGURE 15-6:
SPI SLAVE, FRAME SLAVE CONNECTION DIAGRAM
PIC24H
PROCESSOR 2
SDOx
SDIx
SDIx
SCKx
SSx
Serial Clock
SDOx
SCKx
SSx
Frame Sync
Pulse
EQUATION 15-1: RELATIONSHIP BETWEEN DEVICE AND SPI CLOCK SPEED
FCY
FSCK =
Primary Prescaler * Secondary Prescaler
TABLE 15-1: SAMPLE SCKx FREQUENCIES
FCY = 40 MHz
Primary Prescaler Settings
1:1
4:1
16:1
64:1
FCY = 5 MHz
Primary Prescaler Settings
1:1
4:1
16:1
64:1
Note: SCKx frequencies shown in kHz.
1:1
Invalid
10000
2500
625
5000
1250
313
78
Secondary Prescaler Settings
2:1
4:1
6:1
Invalid
5000
1250
312.5
10000
2500
625
156.25
6666.67
1666.67
416.67
104.17
8:1
5000
1250
312.50
78.125
2500
1250
833
625
625
313
208
156
156
78
52
39
39
20
13
10
DS70175F-page 148
© 2007 Microchip Technology Inc.