DSPIC30F2010-20E/SO Microchip Technology, DSPIC30F2010-20E/SO Datasheet - Page 21

• Manufacturer Part Number: DSPIC30F2010-20E/SO
• Description: IC,DSP,16-BIT,CMOS,SOP,28PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: dsPIC™ 30Fr

Specifications of DSPIC30F2010-20E/SO

• Core Processor: dsPIC
• Core Size: 16-Bit
• Speed: 20 MIPS
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, Motor Control PWM, QEI, POR, PWM, WDT
• Number Of I /o: 20
• Program Memory Size: 12KB (4K x 24)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT28SO-1 - SOCKET TRANSITION 28SOIC 300MIL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

35.4
© 2008 Microchip Technology Inc.
Master Mode Clock Frequency
Section 35. Serial Peripheral Interface (SPI) (Part II)
In the Master mode, the clock provided to the SPI1 module is the instruction cycle (T
clock will then be prescaled by the primary prescaler, specified by PPRE<1:0>
(SPI1CON1<1:0>), and the secondary prescaler, specified by SPRE<2:0> (SPI1CON1<4:2>).
The prescaled instruction clock becomes the serial clock and is provided to external devices
through the SCK1 pin.
Equation 35-1 can be used to calculate the SCK1 clock frequency as a function of the primary
and secondary prescaler settings.
Equation 35-1:
Some sample SPI clock frequencies (in kHz) are shown in Table 35-1.
Table 35-1:
Primary Prescaler Settings
Primary Prescaler Settings
Note 1: SCK1 frequencies are shown in kHz.
Note:
Note:
F
F
Note that the SCK1 signal clock is not free running for normal SPI modes. It will only
run for 8 or 16 pulses when the SPI1BUF is loaded with data. However, it is
continuous for Framed modes.
Not all clock rates are supported. For further information, refer to the SPI module
timing specifications in the specific device data sheet.
CY
CY
= 30 MHz
Sample SCK1 Frequencies
= 5 MHz
SPI Clock Frequency
F
SCK
=
16:1
64:1
16:1
64:1
1:1
4:1
1:1
4:1
Primary Prescaler * Secondary Prescaler
30000
7500
1875
5000
1250
469
313
1:1
78
(1)
F
Secondary Prescaler Settings
CY
15000
3750
2500
938
234
625
156
2:1
39
7500
1875
1250
469
117
313
4:1
78
20
DS70272B-page 35-21
5000
1250
313
833
208
6:1
78
52
13
CY
3750
938
234
625
156
8:1
59
39
10
). This
35