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MCP2140-IP bảng dữ liệu(PDF) 53 Page - Microchip Technology

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MCP2140-IP bảng dữ liệu(HTML) 53 Page - Microchip Technology

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 2003 Microchip Technology Inc.
Preliminary
DS21790A-page 53
MCP2140
APPENDIX D: DB-9 PIN
INFORMATION
Table D-1 shows the DB-9 pin information and the
direction of the MCP2140 signals. The MCP2140 is
designed for use in Data Communications Equipment
(DCE) applications.
TABLE D-1:
DB-9 SIGNAL INFORMATION
APPENDIX E: KNOW PRIMARY
DEVICE
COMPATIBILITY
ISSUES
Table E-1 show the known issues of Primary Devices
interfacing to the MCP2140.
TABLE E-1:
PRIMARY DEVICE ISSUES
DB-9
Pin No.
Signal
Direction
Comment
1
CD
HC
→ MCP2140 Carrier Detect
2
RX
MCP2140
→ HC Received Data
3
TX
HC
→ MCP2140 Transmit Data
4
DTR
HC
→ MCP2140 Data Terminal
Ready
5
GND
—
Ground
6
DSR
MCP2140
→ HC Data Set
Ready
7
RTS
HC
→ MCP2140 Request to
Send
8
CTS
MCP2140
→ HC Clear to Send
9
RI
HC
→ MCP2140 Ring Indicator
Legend: HC = Host Controller
Primary Device
Operating System
Issue
Result
HP Jornada 720
HPC Pro/Windows CE™ 3.0
(Pocket PC)
Jornada 720 transmits 0xFF (not
0xC0) for extra SOF (Start-of-
Frame) characters during NDM.
MCP2140 will not connect
to the Jornada 720.
Personal Computers Windows® 2000 (do not have
list of which versions)
The operating system will reset if
an IR device ID of “null” is
received.
MCP2140 will not connect
to the PC



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