PIC12F1822 MICROCHIP [Microchip Technology], PIC12F1822 Datasheet - Page 259

• Manufacturer Part Number: PIC12F1822
• Description: 8/14-Pin Flash Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

24.6.4
To initiate a Start condition, the user sets the Start
Enable bit, SEN bit of the SSP1CON2 register. If the
SDA and SCL pins are sampled high, the Baud Rate
Generator
SSP1ADD<7:0> and starts its count. If SCL and SDA
are both sampled high when the Baud Rate Generator
times out (T
of the SDA being driven low while SCL is high is the
Start condition and causes the S bit of the SSP1STAT1
register to be set. Following this, the Baud Rate Gen-
erator is reloaded with the contents of SSP1ADD<7:0>
and resumes its count. When the Baud Rate Genera-
tor times out (T
FIGURE 24-26:
 2010 Microchip Technology Inc.
I
CONDITION TIMING
2
C MASTER MODE START
BRG
is
), the SDA pin is driven low. The action
BRG
reloaded
), the SEN bit of the SSP1CON2
FIRST START BIT TIMING
Write to SEN bit occurs here
with
SDA
SCL
the
contents
SDA = 1,
SCL = 1
T
PIC12F/LF1822/16F/LF1823
BRG
Preliminary
of
S
Set S bit (SSP1STAT<3>)
T
BRG
At completion of Start bit,
hardware clears SEN bit
register will be automatically cleared by hardware; the
Baud Rate Generator is suspended, leaving the SDA
line held low and the Start condition is complete.
and sets SSP1IF bit
Note 1: If at the beginning of the Start condition,
Write to SSP1BUF occurs here
T
BRG
2: The Philips I
1st bit
the SDA and SCL pins are already sam-
pled low, or if during the Start condition,
the SCL line is sampled low before the
SDA line is driven low, a bus collision
occurs, the Bus Collision Interrupt Flag,
BCL1IF, is set, the Start condition is
aborted and the I
Idle state.
bus collision cannot occur on a Start.
T
BRG
2
C Specification states that a
2nd bit
2
C module is reset into its
DS41413A-page 259