Datasheet

 2010-2012 Microchip Technology Inc. DS41413C-page 233
PIC12(L)F1822/PIC16(L)F1823
25.0 MASTER SYNCHRONOUS
SERIAL PORT MODULE
25.1 Master SSP (MSSP1) Module
Overview
The Master Synchronous Serial Port (MSSP1) 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 MSSP1 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 25-1 is a block diagram of the SPI interface
module.
FIGURE 25-1: MSSP1 BLOCK DIAGRAM (SPI MODE)
( )
Read Write
Data Bus
SSP1SR Reg
SSP1M<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
SSP1BUF Reg
SDI
SS
SCK
Baud rate
generator
(SSP1ADD)