PIC18F24J11 MICROCHIP [Microchip Technology], PIC18F24J11 Datasheet - Page 324
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PIC18F24J11
Manufacturer Part Number
PIC18F24J11
Description
28/44-Pin, Low-Power, High-Performance USB Microcontrollers with nanoWatt XLP Technology
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F24J11.pdf
(536 pages)
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PIC18F46J11 FAMILY
19.5.17.3
Bus collision occurs during a Stop condition if:
a)
b)
FIGURE 19-33:
FIGURE 19-34:
DS39932D-page 324
After the SDAx pin has been deasserted and
allowed to float high, SDAx is sampled low after
the BRG has timed out.
After the SCLx pin is deasserted, SCLx is
sampled low before SDAx goes high.
SDAx
SCLx
PEN
BCLxIF
P
SSPxIF
SDAx
SCLx
PEN
BCLxIF
P
SSPxIF
Bus Collision During a Stop
Condition
BUS COLLISION DURING A STOP CONDITION (CASE 1)
BUS COLLISION DURING A STOP CONDITION (CASE 2)
SDAx asserted low
Assert SDAx
T
BRG
T
BRG
T
BRG
T
BRG
The Stop condition begins with SDAx asserted low.
When SDAx is sampled low, the SCLx pin is allowed to
float. When the pin is sampled high (clock arbitration),
the BRG is loaded with SSPxADD<6:0> and counts
down to 0. After the BRG times out, SDAx is sampled. If
SDAx is sampled low, a bus collision has occurred. This
is due to another master attempting to drive a data ‘0’
(Figure
SDAx is allowed to float high, a bus collision occurs. This
is another case of another master attempting to drive a
data ‘0’
19-33). If the SCLx pin is sampled low before
(Figure
SCLx goes low before SDAx goes high,
set BCLxIF
T
BRG
T
19-34).
BRG
2011 Microchip Technology Inc.
SDAx sampled
low after T
set BCLxIF
‘0’
‘0’
‘0’
‘0’
BRG
,
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