PIC18F26K80-I/SO Microchip Technology, PIC18F26K80-I/SO Datasheet - Page 332

• Manufacturer Part Number: PIC18F26K80-I/SO
• Description: MCU PIC 64KB FLASH 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F26K80-I/SO

• Core Size: 8-Bit
• Program Memory Size: 64KB (32K x 16)
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Core Processor: PIC
• Speed: 64MHz
• Connectivity: ECAN, I²C, LIN, SPI, UART/USART
• Number Of I /o: 24
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 3.6K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (0.300", 7.50mm Width)
• Controller Family/series: PIC18
• Ram Memory Size: 4KB
• Cpu Speed: 16MIPS
• No. Of Pwm Channels: 5
• Embedded Interface Type: I2C, SPI, USART
• Processor Series: PIC18F26K80
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: I2C, SPI, USART
• Maximum Clock Frequency: 64 MHz
• Number Of Programmable I/os: 24
• Number Of Timers: 5
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC18F66K80 FAMILY
21.4.14
While in Sleep mode, the I
addresses or data and when an address match or
complete byte transfer occurs, wake the processor
from Sleep (if the MSSP interrupt is enabled).
21.4.15
A Reset disables the MSSP module and terminates the
current transfer.
21.4.16
In Multi-Master mode, the interrupt generation on the
detection of the Start and Stop conditions allows the
determination of when the bus is free. The Stop (P) and
Start (S) bits are cleared from a Reset or when the
MSSP module is disabled. Control of the I
be taken when the P bit (SSPSTAT<4>) is set, or the
bus is Idle, with both the S and P bits clear. When the
bus is busy, enabling the MSSP interrupt will generate
the interrupt when the Stop condition occurs.
In multi-master operation, the SDA line must be
monitored for arbitration to see if the signal level is the
expected output level. This check is performed in
hardware with the result placed in the BCLIF bit.
The states where arbitration can be lost are:
• Address Transfer
• Data Transfer
• A Start Condition
• A Repeated Start Condition
• An Acknowledge Condition
FIGURE 21-27:
DS39977C-page 332
SDA
SCL
BCLIF
SLEEP OPERATION
EFFECTS OF A RESET
MULTI-MASTER MODE
BUS COLLISION TIMING FOR TRANSMIT AND ACKNOWLEDGE
2
C module can receive
Data changes
while SCL = 0
2
C bus may
Preliminary
SDA released
by master
SDA line pulled low
by another source
21.4.17
Multi-Master mode support is achieved by bus arbitra-
tion. When the master outputs address/data bits onto
the SDA pin, arbitration takes place when the master
outputs a ‘ 1 ’ on SDA, by letting SDA float high, and
another master asserts a ‘ 0 ’. When the SCL pin floats
high, data should be stable. If the expected data on
SDA is a ‘ 1 ’ and the data sampled on the SDA pin = 0 ,
then a bus collision has taken place. The master will set
the Bus Collision Interrupt Flag, BCLIF, and reset the
I
If a transmit was in progress when the bus collision
occurred, the transmission is halted, the BF flag is
cleared, the SDA and SCL lines are deasserted and the
SSPBUF can be written to. When the user services the
bus collision Interrupt Service Routine and if the I
is free, the user can resume communication by asserting
a Start condition.
If a Start, Repeated Start, Stop or Acknowledge condition
was in progress when the bus collision occurred, the con-
dition is aborted, the SDA and SCL lines are deasserted
and the respective control bits in the SSPCON2 register
are cleared. When the user services the bus collision
Interrupt Service Routine, and if the I
user can resume communication by asserting a Start
condition.
The master will continue to monitor the SDA and SCL
pins. If a Stop condition occurs, the SSPIF bit will be set.
A write to the SSPBUF will start the transmission of
data at the first data bit regardless of where the
transmitter left off when the bus collision occurred.
In Multi-Master mode, the interrupt generation on the
detection of Start and Stop conditions allows the determi-
nation of when the bus is free. Control of the I
be taken when the P bit is set in the SSPSTAT register, or
the bus is Idle and the S and P bits are cleared.
2
C port to its Idle state
MULTI -MASTER COMMUNICATION,
BUS COLLISION AND BUS
ARBITRATION
Sample SDA. While SCL is high,
data doesn’t match what is driven
by the master;
bus collision has occurred.
Set bus collision
interrupt (BCLIF)
(Figure
 2011 Microchip Technology Inc.
21-27).
2
C bus is free, the
2
C bus can
2
C bus