DSPIC33FJ06GS101A-I Datasheet, PDF (205/352 Pages) Microchip Technology – 16-Bit Microcontrollers and Digital Signal Controllers with High-Speed PWM, ADC and Comparators

dsPIC33FJ06GS001/101A/102A/202A and dsPIC33FJ09GS302
16.0 SERIAL PERIPHERAL
INTERFACE (SPI)
Note 1: This data sheet summarizes the features
of the dsPIC33FJ06GS001/101A/102A/
202A and dsPIC33FJ09GS302 family of
devices. It is not intended to be a compre-
hensive reference source. To complement
the information in this data sheet, refer to
Section 18. “Serial Peripheral Interface
(SPI)” (DS70206) of the “dsPIC33F/
PIC24H Family Reference Manual”, which
is available from the Microchip web site
(www.microchip.com).
2: Some registers and associated bits
described in this section may not be
available on all devices. Refer to
Section 4.0 “Memory Organization” in
this data sheet for device-specific register
and bit information.
The Serial Peripheral Interface (SPI) module is a
synchronous serial interface useful for communicating
with other peripheral or microcontroller devices. These
peripheral devices can be serial EEPROMs, shift
registers, display drivers, Analog-to-Digital Converters,
etc. The SPI module is compatible with Motorola^® SPI
and SIOP.
Each SPI module consists of a 16-bit shift register,
SPIxSR (where x = 1 or 2), used for shifting data in and
out, and a buffer register, SPIxBUF. A control register,
SPIxCON, configures the module. Additionally, a status
register, SPIxSTAT, indicates status conditions.
The serial interface consists of 4 pins:
• SDIx (serial data input)
• SDOx (serial data output)
• SCKx (shift clock input or output)
• SSx (active-low slave select)
In Master mode operation, SCKx is a clock output; in
Slave mode, it is a clock input.
FIGURE 16-1:
SPI MODULE BLOCK DIAGRAM
SCKx
SSx
SDOx
SDIx
Sync
Control
Control
Clock
Select
Edge
Shift Control
bit 0
SPIxSR
1:1 to 1:8
Secondary
Prescaler
1:1/4/16/64
Primary
FCY
Prescaler
SPIxCON1<1:0>
SPIxCON1<4:2>
Enable
Master Clock
Transfer
Transfer
SPIxRXB SPIxTXB
SPIxBUF
Read SPIxBUF
Write SPIxBUF
16
Internal Data Bus
 2011-2012 Microchip Technology Inc.
DS75018C-page 205