DSPIC33FJ16GS502-I Datasheet, PDF (219/346 Pages) Microchip Technology – High-Performance, 16-bit Digital Signal Controllers

dsPIC33FJ06GS101/X02 and dsPIC33FJ16GSX02/X04
16.0 SERIAL PERIPHERAL
INTERFACE (SPI)
Note:
This data sheet summarizes the features
of the dsPIC33FJ06GS101/X02 and
dsPIC33FJ16GSX02/X04 families of
devices. It is not intended to be a
comprehensive reference source. To
complement the information in this data
sheet, refer to the “dsPIC33F Family
Reference Manual”, Section 18. “Serial
Peripheral Interface (SPI)” (DS70206),
which is available on the Microchip
web site (www.microchip.com).
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
and so on. The SPI module is compatible with SPI and
SIOP from Motorola^®.
The SPI module consists of a 16-bit shift register,
SPIxSR (where x = 1), 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 the following four pins:
• SDIx (Serial Data Input)
• SDOx (Serial Data Output)
• SCKx (Shift Clock Input Or Output)
• SSx (Active-Low Slave Select).
In Master mode operation, SCK 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
© 2009 Microchip Technology Inc.
Preliminary
DS70318D-page 217