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Elan Digital Systems Ltd. 4 CF232 USER’S GUIDE
2. ABOUT THE CF232
The CF232 card is an RS232 serial card with Elan’s own 16550
compatible UART ASIC device, called the VPU16550. The serial
data and control lines are buffered using ESD protected RS232
drivers.
Industry standard baud rates up to 115.2K baud are supported,
together with 16-byte deep TX and RX FIFOs. On H/W Rev3.00
cards, a small switch is located at the back edge of the card, which
allows selection of “x1” or “x8” baud rate multiplier. This feature
allows up to 921KBaud operation without needing special device
drivers on the host (in x8 mode you simply multiply the setting
shown on the host by 8 to get the real serial data rate e.g. 19200Baud
set on host with x8 mode gives 153600Baud true rate in hardware).
See section 5 for the switch settings.
For further information please refer to the VPU16550 data sheet
available from our website, http://www.pccard.co.uk
The CF232 conforms to the industry standard Compact Flash+
interface that allows connection of peripherals to the system bus of a
laptop, handheld PC or PDA. The CF+ specification extends the
earlier memory-only Compact Flash interface to allow I/O devices
and extra power for the card. The CF232 is an I/O type device and
therefore requires a CF+ capable slot.