41594B datasheet(210/372 Pages) MICROCHIP

210 / 372 page

PIC12LF1840T48A

DS41594B-page 210

Preliminary

 2011-2012 Microchip Technology Inc.

The I2C interface supports the following modes and

features:

•Master mode

• Slave mode

• Byte NACKing (Slave mode)

• Limited Multi-master support

• 7-bit and 10-bit addressing

• Start and Stop interrupts

• Interrupt masking

• Clock stretching

• Bus collision detection

• General call address matching

•Address masking

• Address Hold and Data Hold modes

• Selectable SDA hold times

Figure 25-2 is a block diagram of the I2C interface mod-

ule in Master mode. Figure 25-3 is a diagram of the I2C

interface module in Slave mode.

FIGURE 25-2:

MSSP1 BLOCK DIAGRAM (I2C™ MASTER MODE)

Read

Write

SSP1SR

Start bit, Stop bit,

Start bit detect,

SSP1BUF

Internal

data bus

Set/Reset: S, P, SSP1STAT, WCOL, SSP1OV

Shift

Clock

MSb

LSb

SDA

Acknowledge

Generate (SSP1CON2)

Stop bit detect

Write collision detect

Clock arbitration

State counter for

end of XMIT/RCV

SCL

SCL in

Bus Collision

SDA in

[SSP1M 3:0]

Baud Rate

Reset SEN, PEN (SSP1CON2)

Generator

(SSP1ADD)

Address Match detect

Set SSP1IF, BCL1IF

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