PIC18F23K22 Datasheet, PDF (207/492 Pages) Microchip Technology – 28/40/44-Pin, Low-Power, High-Performance Microcontrollers with nanoWatt XLP Technology

PIC18(L)F2X/4XK22
15.0 MASTER SYNCHRONOUS
SERIAL PORT (MSSP1 AND
MSSP2) MODULE
15.1 Master SSPx (MSSPx) 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,
display 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 15-1 is a block diagram of the SPI interface
module.
FIGURE 15-1:
MSSPx BLOCK DIAGRAM (SPI MODE)
Read
Data Bus
Write
SSPxBUF Reg
SDIx
SDOx
SSPxSR Reg
bit 0
Shift
Clock
SSx
SCKx
SSx Control
Enable
Edge
Select
2 (CKP, CKE)
Clock Select
SSPxM<3:0>
4
( ) ^{TMR2 Output}
2
Edge
Select
Prescaler TOSC
4, 16, 64
TRIS bit
Baud Rate
Generator
(SSPxADD)
 2010 Microchip Technology Inc.
Preliminary
DS41412B-page 207