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42 www.xilinx.com ML310 User Guide
1-800-255-7778 UG068 (v1.01) August 25, 2004
Chapter 2: ML310 Embedded Development Platform
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Table 2-13 shows the ALi Parallel Port connections to P1, DB25.
Serial Port Interface, connector assembly P1
In addition to the serial port accessible via the XC2VP30 FPGA, the ALi M1535D+ provides
access over the PCI Bus to two serial ports. The ALi M1535D+ employs 16450/16550
Compatible UARTs with Send/Receive16-byte FIFOs. The two Serial ports are connected
to the ALi M1535D+ device via two male DB9 connectors (P1). The DB9 connectors are
configured as DTE interfaces and meet the EIA/TIA-574 standard.
The DB9 male connectors are labeled Serial Port A and B in the ML310 schematics. The DB9
connectors are part of the P1 connector assembly. Please note that Serial Port B is located
adjacent to the PS/2 connector where COM1 in a legacy PC is traditionally located. The
two DB9 serial port connectors are labeled on the ML310 board silk-screen near the P1
connector assembly. Please review the ALi M1535D+ Data sheets for more detailed
information.
Table 2-13: ALi South Bridge Parallel Port pinout P1 (DB25)
Signal Name
P1 (DB25)
Pin No.
Description
STROBE_N 1 Strobe
D0 2 Data Bit 0
D1 3 Data Bit 1
D2 4 Data Bit 2
D3 5 Data Bit 3
D4 6 Data Bit 4
D5 7 Data Bit 5
D6 8 Data Bit 6
D7 9 Data Bit 7
ACK_N 10 Acknowledge
BUSY 11 Busy
PEND 12 Paper End
SELECT 13 Select
AUTOFD_N 14 Autofeed
ERROR_N 15 Error
INIT_N 16 Initialize
SLCTIN_N 17 Select In
GND 18, 19, 20,
21, 22, 23,
24, 25
Ground