PIC18F87J72-I/PT Microchip Technology, PIC18F87J72-I/PT Datasheet - Page 237
PIC18F87J72-I/PT
Manufacturer Part Number
PIC18F87J72-I/PT
Description
IC PIC MCU 8BIT 14KB FLSH 80TQFP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheet
1.PIC18F86J72-IPT.pdf
(480 pages)
Specifications of PIC18F87J72-I/PT
Program Memory Type
FLASH
Program Memory Size
128KB (64K x 16)
Package / Case
80-TQFP
Core Processor
PIC
Core Size
8-Bit
Speed
48MHz
Connectivity
I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LCD, LVD, POR, PWM, WDT
Number Of I /o
51
Ram Size
3.8K x 8
Voltage - Supply (vcc/vdd)
2 V ~ 3.6 V
Data Converters
A/D 12x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Data Bus Width
8 bit
Data Ram Size
4 KB
Interface Type
SPI, USART, SPI, I2C
Maximum Clock Frequency
8 MHz
Number Of Programmable I/os
51
Number Of Timers
4
Operating Supply Voltage
2 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
14
Controller Family/series
PIC18F
No. Of I/o's
51
Ram Memory Size
3923Byte
Cpu Speed
48MHz
No. Of Timers
4
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Available stocks
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Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F87J72-I/PT
Manufacturer:
Microchip
Quantity:
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Manufacturer:
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18.4.17.3
Bus collision occurs during a Stop condition if:
a)
b)
FIGURE 18-33:
FIGURE 18-34:
2010 Microchip Technology Inc.
After the SDA pin has been deasserted and
allowed to float high, SDA is sampled low after
the BRG has timed out.
After the SCL pin is deasserted, SCL is sampled
low before SDA goes high.
SDA
SCL
PEN
BCLIF
P
SSPIF
SDA
SCL
PEN
BCLIF
P
SSPIF
Bus Collision During a Stop
Condition
BUS COLLISION DURING A STOP CONDITION (CASE 1)
BUS COLLISION DURING A STOP CONDITION (CASE 2)
SDA asserted low
Assert SDA
T
T
BRG
BRG
Preliminary
T
BRG
T
BRG
PIC18F87J72 FAMILY
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 18-33). If the SCL pin is
sampled low before SDA is allowed to float high, a bus
collision occurs. This is another case of another master
attempting to drive a data ‘0’ (Figure 18-34).
SCL goes low before SDA goes high,
set BCLIF
T
BRG
T
BRG
SDA sampled
low after T
set BCLIF
‘0’
‘0’
DS39979A-page 237
‘0’
‘0’
BRG
,
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