MCP1631RD-MCC2 Microchip Technology, MCP1631RD-MCC2 Datasheet - Page 209

• Manufacturer Part Number: MCP1631RD-MCC2
• Description: REFERENCE DESIGN MCP1631HV
• Manufacturer: Microchip Technology

Specifications of MCP1631RD-MCC2

• Main Purpose: Power Management, Battery Charger
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MCP1631HV, PIC16F883
• Primary Attributes: 1 ~ 2 Cell- Li-Ion, 1 ~ 5 Cell- NiCd/NiMH, 1 ~ 2 1W LEDs
• Secondary Attributes: Status LEDs
• Silicon Manufacturer: Microchip
• Application Sub Type: Battery Charger
• Kit Application Type: Power Management - Battery
• Silicon Core Number: MCP1631HV, PIC16F883
• Kit Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

13.4.16.3
Bus collision occurs during a Stop condition if:
a)
b)
FIGURE 13-26:
FIGURE 13-27:
© 2009 Microchip Technology Inc.
After the SDA pin has been de-asserted and
allowed to float high, SDA is sampled low after
the BRG has timed out.
After the SCL pin is de-asserted, SCL is
sampled low before SDA goes high.
SDA
SCL
PEN
BCLIF
P
SSPIF
SSPIF
BCLIF
SDA
PEN
SCL
Bus Collision During a Stop
Condition
P
BUS COLLISION DURING A STOP CONDITION (CASE 1)
BUS COLLISION DURING A STOP CONDITION (CASE 2)
Assert SDA
T
SDA asserted low
BRG
T
BRG
PIC16F882/883/884/886/887
T
BRG
T
BRG
The Stop condition begins with SDA asserted low.
When SDA is sampled low, the SCL pin is allowed to
float. When the pin is sampled high (clock arbitration),
the Baud Rate Generator is loaded with SSPADD<6:0>
and counts down to 0. After the BRG times out, SDA is
sampled. If SDA is sampled low, a bus collision has
occurred. This is due to another master attempting to
drive a data ‘0’ (Figure 13-26). If the SCL pin is sam-
pled low before SDA is allowed to float high, a bus col-
lision occurs. This is another case of another master
attempting to drive a data ‘0’ (Figure 13-27).
SCL goes low before SDA goes high,
set BCLIF
T
BRG
T
BRG
‘
‘
0
0
DS41291F-page 207
’
’
SDA sampled
low after T
set BCLIF
‘
‘
0
0
’
’
BRG
,