PIC16 datasheet(181/418 Pages) MICROCHIP

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 2011-2013 Microchip Technology Inc.

DS40001609C-page 181

PIC16(L)F1508/9

21.0 MASTER SYNCHRONOUS

SERIAL PORT (MSSP)

MODULE

21.1

MSSP Module Overview

The Master Synchronous Serial Port (MSSPx) module

is a serial interface useful for communicating with other

peripheral or microcontroller devices. These peripheral

devices may be serial EEPROMs, shift registers, dis-

play drivers, A/D converters, etc. The MSSPx module

can operate in one of two modes:

• Serial Peripheral Interface (SPI)

• Inter-Integrated Circuit (I2C™)

The SPI interface supports the following modes and

features:

•Master mode

• Slave mode

• Clock Parity

• Slave Select Synchronization (Slave mode only)

• Daisy-chain connection of slave devices

Figure 21-1 is a block diagram of the SPI interface

module.

FIGURE 21-1:

MSSP BLOCK DIAGRAM (SPI MODE)

Read

Write

SSPxBUF

SSPxSR

Bit 0

Shift clock

SDI

SDO

Data bus

Control

Enable

(CKP, CKE)

clock select

Edge

enable

Edge

enable

SCK_out

Prescaler

4, 16, 64

(T2_match)

TOSC

Baud Rate

Generator

(SSPxADD)

TRIS bit

SSPM<3:0>

Rev. 10-000076A

7/30/2013

SSx

SDO_out

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