PIC16F913 datasheet(161/272 Pages) MICROCHIP

161 / 272 page

Preliminary

DS41250E-page 159

PIC16F917/916/914/913

14.0

SSP MODULE OVERVIEW

The Synchronous Serial Port (SSP) module is a serial

interface used to communicate with other peripheral or

microcontroller devices. These peripheral devices may

be serial EEPROMs, shift registers, display drivers,

A/D converters, etc. The SSP module can operate in

one of two modes:

• Serial Peripheral Interface (SPI™)

• Inter-Integrated Circuit (I2C

™)

An overview of I2C operations and additional information

on the SSP module can be found in the “PICmicro®

Mid-Range MCU Family Reference Manual” (DS33023).

Refer to Application Note AN578, “Use of the SSP

Module in the Multi-Master Environment” (DS00578).

14.1

SPI Mode

This section contains register definitions and operational

characteristics of the SPI module. Additional information

on the SPI module can be found in the “PICmicro®

Mid-Range MCU Family Reference Manual” (DS33023).

The SPI mode allows 8 bits of data to be synchronously

transmitted and received simultaneously. To accomplish

communication, typically three pins are used:

• Serial Data Out (SDO)

– RC4/T1G/SDO/SEG11

• Serial Data In (SDI)

– RC7/RX/DT/SDI/SDA/SEG8

• Serial Clock (SCK)

– RC6/TX/CK/SCK/SCL/SEG9

Additionally, a fourth pin may be used when in a Slave

mode of operation:

• Slave Select (SS)

– RA5/AN4/C2OUT/SS/SEG5

When initializing the SPI, several options need to be

specified. This is done by programming the appropriate

control bits in the SSPCON register (SSPCON<5:0>)

and SSPSTAT<7:6>. These control bits allow the

following to be specified:

• Master mode (SCK is the clock output)

• Slave mode (SCK is the clock input)

• Clock Polarity (Idle state of SCK)

• Clock edge (output data on rising/falling edge of

SCK)

• Clock Rate (Master mode only)

• Slave Select mode (Slave mode only)

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