CyClone COMPACTPCI-810, Руководство пользователя

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HARDWARE
3-2
CPCI-810 User’s Manual
Revision 1.1, June 2001
3.2 FLASH ROM
The CPCI-810 provides 2 Mbytes of sector-programmable Flash ROM for non-volatile code storage.
The Flash ROM is located in local memory space at address FFE0 0000h through FFFF FFFFh. The
mapping ensures that, after a reset, the MPC8240 processor can execute the hard reset exception handler
located at FFF0 0100h.
3.3 CONSOLE SERIAL PORT
A single console serial port with an RS-232 line interface has been included on the CPCI-810. The port
is connected to a RJ-11 style phone jack on the adapter, and can be connected to a host system using the
included phone jack to DB-25 cable (Cyclone P/N 530-2006). The pinout of the console connector is as
shown in Table 3-1.
Table 3-1. Console Port Connector
The serial port is based on a 16C550 UART clocked at 1.843 MHz. The device may be programmed to
use this clock with the internal baud rate counters. The serial port is capable of operating at speeds from
300 to 115200 bps, and can be operated in interrupt-driven or polled mode. The 16C550 register set is
shown in Table 3-2. For a detailed description of the registers and device operation refer to the 16C550
databook.
Table 3-2. UART Register Addresses
Pin Signal Description
1 Not Used
2 GND Ground
3 TXD Transmit Data
4 RXD Receive Data
5 Not Used
6 Not Used
Address Read Register Write Register
FF00 0000H Receive Holding Register Transmit Holding Register
FF00 0008H Unused Interrupt Enable Register
FF00 0010H Interrupt Status Register FIFO Control Register
FF00 0018H Unused Line Control Register
FF00 0020H Unused Modem Control Register
FF00 0028H Line Status Register Unused
FF00 0030H Modem Status Register Unused
FF00 0038H Scratchpad Register Scratchpad Register
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