Datasheet

 2012 Microchip Technology Inc. DS30684A-page 213
PIC18(L)F2X/45K50
16.0 MASTER SYNCHRONOUS
SERIAL PORT (MSSP)
MODULE
16.1 Module Overview
The Master Synchronous Serial Port (MSSP) module is
a serial interface useful for communicating with other
peripheral or microcontroller devices. These peripheral
devices may be Serial EEPROMs, shift registers,
display drivers, A/D converters, etc. The MSSP module
can operate in one of two modes:
• Serial Peripheral Interface (SPI)
• Inter-Integrated Circuit (I
2
C™)
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 16-1 is a block diagram of the SPI interface
module.
FIGURE 16-1: MSSP BLOCK DIAGRAM (SPI MODE)
( )
Read Write
Data Bus
SSPxSR Reg
SSPxM<3:0>
bit 0
Shift
Clock
SS
Control
Enable
Edge
Select
Clock Select
TMR2 Output
T
OSC
Prescaler
4, 16, 64
2
Edge
Select
2 (CKP, CKE)
4
TRIS bit
SDO
SSPxBUF Reg
SDI
SS
SCK
Baud Rate
Generator
(SSPxADD)