MCP2515-I/ST Microchip Technology, MCP2515-I/ST Datasheet - Page 38
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MCP2515-I/ST
Manufacturer Part Number
MCP2515-I/ST
Description
IC CAN CONTROLLER W/SPI 20TSSOP
Manufacturer
Microchip Technology
Specifications of MCP2515-I/ST
Package / Case
20-TSSOP
Controller Type
CAN Interface
Interface
SPI
Voltage - Supply
2.7 V ~ 5.5 V
Current - Supply
10mA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Product
Controller Area Network (CAN)
Number Of Transceivers
1
Data Rate
1 Mbps
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.7 V
Supply Current (max)
10 mA
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Supply Voltage Range
2.7V To 5.5V
Driver Case Style
TSSOP
No. Of Pins
20
Operating Temperature Range
-40°C To +85��C
Filter Terminals
SMD
Supply Voltage Min
2.7V
Rohs Compliant
Yes
Interface Type
SPI
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
MCP2515DM-BM - BOARD DEMO FOR MCP2515/51MCP2515DM-PTPLS - BOARD DAUGHTER PICTAIL MCP2515MCP2515DM-PCTL - BOARD DEMO FOR MCP2515DV251001 - KIT DEVELOPMENT CAN MCP2510
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MCP2515-I/ST
Manufacturer:
HYNIX
Quantity:
7 600
Company:
Part Number:
MCP2515-I/ST
Manufacturer:
MICROCHI
Quantity:
5 920
Company:
Part Number:
MCP2515-I/ST
Manufacturer:
MICROCHI
Quantity:
200
Part Number:
MCP2515-I/ST
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
MCP2515
PROPAGATION SEGMENT
The Propagation Segment (PropSeg) exists to
compensate for physical delays between nodes. The
propagation delay is defined as twice the sum of the
signal’s propagation time on the bus line, including the
delays associated with the bus driver. The PropSeg is
programmable from 1 - 8 TQ.
PHASE SEGMENT 1 AND PHASE SEGMENT 2
The two phase segments PS1 and PS2 are used to
compensate for edge phase errors on the bus. PS1 can
be lengthened, or PS2 can be shortened, by
resyncronization. PS1 is programmable from 1 - 8 TQ
and PS2 is programmable from 2 - 8 TQ.
SAMPLE POINT
The sample point is the point in the bit time at which the
logic level is read and interpreted. The sample point is
located at the end of phase segment 1. The exception
to this rule is if the sample mode is configured to sam-
ple three times per bit. In this case, while the bit is still
sampled at the end of PS1, two additional samples are
taken at one-half TQ intervals prior to the end of PS1
and the value of the bit is determined by a majority deci-
sion.
INFORMATION PROCESSING TIME
The Information Processing Time (IPT) is the time
required for the logic to determine the bit level of a
sampled bit. The IPT begins at the sample point, is
measured in TQ and is fixed at 2 TQ for the Microchip
CAN module. Since phase segment 2 also begins at
the sample point and is the last segment in the bit time,
it is required that PS2 minimum is not less than the IPT.
FIGURE 5-2:
DS21801B-page 38
t
T
t
osc
BIT
BRPCLK
(fixed)
TQ AND THE BIT PERIOD
Sync
(t
TQ
TQ
)
(Programmable)
PropSeg
Preliminary
CAN Bit Time
(Programmable)
Therefore:
SYNCHRONIZATION JUMP WIDTH
The Synchronization Jump Width (SJW) adjusts the bit
clock as necessary by 1 - 4TQ (as configured) to
maintain
message. Synchronization is covered in more detail
later in this data sheet.
Time Quantum
Each of the segments that make up a bit time are made
up of integer units called Time Quanta (TQ). The length
of each Time Quantum is based on the oscillator period
(t
Figure 5-2 shows how the bit period is derived from
T
period (t
programmable prescaler, called the Baud Rate
Prescaler (BRP). This is illustrated in the following
equation:
EQUATION
PS1
OSC
OSC
Where: BRP equals the configuration as shown in
). The base TQ equals twice the oscillator period.
and TQ. The TQ length equals one TQ clock
BRPCLK
Register 5-1.
TQ
synchronization
=
PS2 min
), which is programmable using a
2 BRP T OSC
(Programmable)
=
PS2
2003 Microchip Technology Inc.
IPT
with
=
=
2TQ
2 BRP
------------------ -
F OSC
the
transmitted