dspic33fj128gp204 Microchip Technology Inc., dspic33fj128gp204 Datasheet - Page 199
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dspic33fj128gp204
Manufacturer Part Number
dspic33fj128gp204
Description
High-performance, 16-bit Digital Signal Controllers
Manufacturer
Microchip Technology Inc.
Datasheet
1.DSPIC33FJ128GP204.pdf
(386 pages)
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16.0
The Serial Peripheral Interface (SPI) module is a syn-
chronous serial interface useful for communicating with
other peripheral or microcontroller devices. These
FIGURE 16-1:
© 2009 Microchip Technology Inc.
Note:
SDOx
SCKx
SDIx
SSx
SERIAL PERIPHERAL
INTERFACE (SPI)
This data sheet summarizes the features
of
dsPIC33FJ64GPX02/X04
dsPIC33FJ128GPX02/X04
devices. It is not intended to be a
comprehensive
complement the information in this data
sheet, refer to the “dsPIC33F Family
Reference Manual”, “Section 18. Serial
Peripheral Interface (SPI)” (DS70206),
which is available from the Microchip
website (www.microchip.com).
Read SPIxBUF
Control
Sync
the
Transfer
SPI MODULE BLOCK DIAGRAM
dsPIC33FJ32GP302/304,
SPIxRXB
bit 0
reference
SPIxBUF
SPIxSR
Control
Clock
Shift Control
SPIxTXB
families
source.
Transfer
Write SPIxBUF
and
Preliminary
To
of
Select
Edge
peripheral devices can be serial EEPROMs, shift regis-
ters, display drivers, analog-to-digital converters, etc.
The SPI module is compatible with SPI and SIOP from
Motorola
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, SCK is a clock output. In
Slave mode, it is a clock input.
16
Secondary
1:1 to 1:8
Prescaler
®
Internal Data Bus
.
1:1/4/16/64
Prescaler
Primary
F
SPIxCON1<1:0>
SPIxCON1<4:2>
Enable
Master Clock
DS70292C-page 197
CY
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