Microchip Technology DM300023 数据表
dsPIC30F1010/202X
DS70178C-page 148
Preliminary
©
2006 Microchip Technology Inc.
FIGURE 13-5:
SPI SLAVE, FRAME MASTER CONNECTION DIAGRAM
FIGURE 13-6:
SPI SLAVE, FRAME SLAVE CONNECTION DIAGRAM
EQUATION 13-1:
RELATIONSHIP BETWEEN DEVICE AND SPI CLOCK SPEED
TABLE 13-1:
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
7500
5000
3750
4:1
7500
3750
1875
1250
937.5
16:1
1875
937.5
469
312.5
234.4
64:1
469
234.4
117
78.1
58.6
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
=