PIC16F88

Manufacturer Part NumberPIC16F88
ManufacturerMicrochip Technology Inc.
PIC16F88 datasheet
 
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10.0
SYNCHRONOUS SERIAL PORT
(SSP) MODULE
10.1
SSP Module Overview
The Synchronous Serial Port (SSP) module is a serial
interface useful for communicating with other periph-
eral 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™)
2
• Inter-Integrated Circuit (I
C™)
2
An overview of I
C operations and additional informa-
tion on the SSP module can be found in the “PICmicro
Mid-Range
MCU
Family
Reference
(DS33023).
Refer to Application Note AN578, “Use of the SSP
2
Module in the I
C™ Multi-Master Environment”
(DS00578).
 2005 Microchip Technology Inc.
10.2
SPI Mode
This
section
contains
operational characteristics of the SPI module.
SPI mode allows 8 bits of data to be synchronously
transmitted
and
accomplish communication, typically three pins are
used:
• Serial Data Out (SDO)
• Serial Data In (SDI)
• Serial Clock (SCK)
Additionally, a fourth pin may be used when in a Slave
mode of operation:
• Slave Select (SS)
®
When initializing the SPI, several options need to be
Manual”
specified. This is done by programming the appropriate
control bits in the SSPCON register (SSPCON<5:0>)
and the SSPSTAT register (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)
Note:
Before enabling the module in SPI Slave
mode, the state of the clock line (SCK)
must match the polarity selected for the
Idle state. The clock line can be observed
by reading the SCK pin. The polarity of the
Idle state is determined by the CKP bit
(SSPCON<4>).
PIC16F87/88
register
definitions
and
received
simultaneously.
To
RB2/SDO/RX/DT
RB1/SDI/SDA
RB4/SCK/SCL
RB5/SS/TX/CK
DS30487C-page 87