26
Module Description
3.9
Serial Ports
The CMx-BTx module provides up to four serial ports through an LPC-to-UART Bridge
(NCT5104D from Nuvoton.) All four serial ports are capable of running as RS232, RS422, or
RS485, and each supports the following features:
16650-compatible UART with 128-byte send/receive FIFO
Programmable baud rate generator
5, 6, 7 or 8-bit characters
Even, odd or no parity bit generation / detection
1, 1.5 or 2 stop-bit generation
Loop-back controls for communications link fault isolation
Break, parity, overrun, framing error simulation
Speeds up to 115.2 kbaud in normal mode
Up to 1.5 Mbaud in high speed mode (requires a custom BIOS, available on request)
The two COM ports COM2 and COM3 are fully implemented COM ports, supporting all nine
defined signals, while the two COM ports COM0 and COM1 support only RXD, TXD and their
corresponding handshake signals RTS# and CTS#.
The COM0 and COM1 are bundled on a Hirose DF13-9 connector (V) with the following pin out:
Table 3-10: COM0 and COM1 Serial Port Signal Definitions (CN17)
Pin#
RS232
RS485
DB9 - COM0
DB9 - COM1
1
COM0_RX COM0_RX-
Pin
2
N/A
2
COM0_RTS#
Pin 7
N/A
3
COM0_TX
COM0_TX-
Pin 3
N/A
4
COM0_CTS#
Pin 8
N/A
5
GND
Not Used
Pin 5
Pin 5
6
COM1_RX
COM1_RX-
N/A
Pin 2
7
COM1_RTS#
N/A Pin
7
8
COM1_TX
COM1_TX-
N/A Pin
3
9
COM1_CTS#
N/A Pin
8
Standard
DB9
Connector
5
4
3
2
1
9
8
7
6
CN17
Summary of Contents for CM1-BT1
Page 5: ...iv...
Page 9: ...viii...
Page 15: ...6 Introduction...
Page 23: ...14 Getting Started BLANK PAGE...
Page 57: ...48 Using the Module 4 4 10 Main System Management Smart Fan 4 4 11 Advanced...
Page 76: ...Using the Module 67 CMx BTx 4 4 48 Security 4 4 49 Boot...
Page 77: ...68 Using the Module 4 4 50 Boot CSM Configuration 4 4 51 Boot Delete Boot Option...
