Microchip Technology AC164139 Data Sheet
2010 Microchip Technology Inc.
DS39969B-page 221
PIC24FJ256DA210 FAMILY
EQUATION 15-1:
RELATIONSHIP BETWEEN DEVICE AND SPI CLOCK SPEED
(1)
Note 1: Based on F
CY
= F
OSC
/2; Doze mode and PLL are disabled.
FSCK =
F
CY
Primary Prescaler x Secondary Prescaler
TABLE 15-1:
SAMPLE SCKx FREQUENCIES
(1,2)
F
CY
= 16 MHz
Secondary Prescaler Settings
1:1
2:1
4:1
6:1
8:1
Primary Prescaler Settings
1:1
Invalid
8000
4000
2667
2000
4:1
4000
2000
1000
667
500
16:1
1000
500
250
167
125
64:1
250
125
63
42
31
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 1:
Based on F
CY
= F
OSC
/2; Doze mode and PLL are disabled.
2:
SCKx frequencies shown in kHz.