Moxa C32010T/PCIEL — технические характеристики модуля с несколькими последовательными портами [43/43]

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C320Turbo/PCIEL Technical Reference

A-3

Extensive Module (for Rackmount option)

• 8 or 16 RS-232 serial ports

• 16550C UART chip with 32 bytes FIFO (Tx+Rx) and on-chip hardware flow control

• Each UART chip drives one serial port (Max. 460.8 Kbps)

• Full modem control (RS-232 interface)

• RJ45 connector for each serial port

Dual-Ported RAM

There is 512 KB of dual-ported DRAM on the Intellio C320Turbo/PCIEL Control Board, which is used as a data

buffer and memory map device for the motherboard. it is called “dual-ported” because it is accessed by both

motherboard CPU and the Intellio C320Turbo/PCIEL Control Board’s on-board CPU. Generally speaking, the

memory access time is much faster than normal I/O access.

All messages and data are transferred through this 512 KB dual-ported memory. The buffer area appears as

normal 16-bit memory to the PC AT I/O channel.

Every Intellio C320Turbo/PCIEL Control Board only occupies 16 KB of memory space (window) from the system

point of view. Memory base addresses range from 1 M to 4 GB.

16550C in UART/Basic/Extensive Modules

The 16550C is an advanced asynchronous controller capable of on-chip hardware flow control and highest

speed up to 921.6 Kbps. Inside UART/Basic/Extensive Module, each 16550C chip controls one port.