MCP2140DM-TMPSNS Microchip Technology, MCP2140DM-TMPSNS Datasheet - Page 15

BOARD DEMO FOR MCP2140

MCP2140DM-TMPSNS

Manufacturer Part Number
MCP2140DM-TMPSNS
Description
BOARD DEMO FOR MCP2140
Manufacturer
Microchip Technology

Specifications of MCP2140DM-TMPSNS

Main Purpose
Interface, IrDA
Embedded
Yes, MCU, 8-Bit
Utilized Ic / Part
MCP2140
Primary Attributes
IrDA Controller with PIC18F MCU and Temp Sensor Temp
Secondary Attributes
Set up as a Data Logger
Processor To Be Evaluated
MCP2140
Interface Type
ICSP
Silicon Manufacturer
Microchip
Silicon Core Number
MCP2140
Kit Application Type
Sensing - Temperature
Application Sub Type
Temperature Sensor
Kit Contents
Board
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
Other names
MCP2140DM-TMPSNSR
MCP2140DM-TMPSNSR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MCP2140DM-TMPSNS
Manufacturer:
Microchip Technology
Quantity:
135
Part Number:
MCP2140DM-TMPSNS
Manufacturer:
MICROCHIP
Quantity:
12 000
2.10
The IR data rate of the MCP2140 is fixed at 9.6 kbaud.
The actual throughput will be less due to several fac-
tors. The most significant factors are under the control
of the developer. One factor beyond the control of the
designer is the overhead associated with the IrDA
standard. A throughput example is shown in
Figure 2-9 shows the CTS waveform, what the state of
the buffers can be and the operation of the Host UART
and IR interfaces.
Figure 2-10 shows the screen-capture of a Host Con-
troller transmitting 240 bytes. Data is not transmitted
after CTS goes high (so only a maximum of 23 bytes of
the 29 byte buffer are utilized). Between data packets,
the CTS time can vary, depending on the Primary
Device (see blue circled CTS pulse in Figure 2-10).
FIGURE 2-9:
FIGURE 2-10:
CTS
2003 Microchip Technology Inc.
Buffers and Throughput
Receive Buffer Empty
MCP2140 Can Receive Data Receive Buffer Has 22 Bytes,
HOST UART RECEIVE BUFFER AND CTS WAVEFORM
HOST CONTROLLER TRANSMISSION OF A 240 BYTE PACKET
Table
CTS Pin Driven High
2-4.
Preliminary
Receive Buffer
Full (29 Bytes)
TABLE 2-4:
Note 1: Measured from Figure 2-10.
Transferred
Note:
Bytes
240
240
(3)
2: Interpolated from Figure 2-10.
3: 10 bits transferred for each byte.
IrDA throughput is based on many factors
associated with characteristics of the Pri-
mary and Secondary devices. These char-
acteristics may cause your throughput to
be more or less than is shown in Table 2-4.
IR Data Packet Starts Transmission
23 (max)
CTS Low
THROUGHPUT
Bytes/
29
Receive Buffer Empty
MCP2140 Can Receive Data
IR Data Packet Transmitted
(1)
MCP2140
0.810133
Time (S)
0.6500
DS21790A-page 15
Baud Rate
Effective
2962
3692
(1)
(2)

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