User's Manual

232CCxx4502-1/2
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PRODUCT INFORMATION
PRODUCT INFORMATION PRODUCT INFORMATION
PRODUCT INFORMATION
Models: 232CC1A, 232CC1B, 232CC2A, 232CC2B
Any Address, Any IRQ,
RS-232 Serial Cards
CE
Overview
B&B Electronics’ 232CC series RS-232 serial interface cards provide the flexibility needed to fit into today’s
complex communication systems. Designed for the IBM PC, XT, AT and compatibles, the 232CC card ports may be
independently configured for any I/O address and any available hardware interrupt. Ports are configured as a standard
DTE device, and connections are made on 9-pin male D-style connectors.
The 232CC cards now feature Enhanced Address Decoding, which decodes the entire 16-bit address bus,
versus the 10 bits traditionally used by serial cards. This feature minimizes hardware conflict potential by eliminating
shadowing of the serial port at higher addresses, eliminating the COM 4 - video card conflict. Also featured on the
232CC cards is a clock doubling feature which allows each port to communicate at up to 230.4 Kbaud when enabled.
This option doubles the baud rate set by the software.
High speed 16550A UARTs come standard with the 232CC series cards. Optionally, the new 16850 UART is
available, featuring 128-byte transmit and receive FIFO’s and full 16450 and 16550A compatibility. NOTE: to enable
these enhanced features, the driver software must support the 16850.
Features
Switch selectable addresses, from 0 to hex 3F8, including COM1 - COM4
Enhanced 16-bit address decoding
Baud rates up to 230.4 Kbaud with 2X clock option enabled
16550A UARTs standard, 16850 UARTs available
Jumper selectable interrupts: 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, and 15
Supports all standard RS-232 lines: TD, RD, RTS, CTS, DSR, DCD, DTR, and RI
Specifications
Bus: IBM PC ISA Bus
Slot: Requires 1 full length slot for complete IRQ selectability.
When installed in a short slot, IRQs 10-15 will not be available.
Dimensions: 6.3 x 3.3 in (16.0 X 8.4cm)
I/O connection: 9-pin male D-sub connectors
Baud rates: 230,400 Baud max with x2 clock jumper enabled
Character length: 5, 6, 7, or 8 bits
Parity: Even, odd or none
Stop bits: 1, 1.5, or 2
Interrupt: IRQ 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, or 15
Address: Switch programmable, 0 to hex 3F8
RS-232 Transceiver
TD and RD Device: DS232AS
Transmitter output voltage: ± 5.0 V minimum
Short circuit current: ± 30 mA typical
Input low level threshold voltage: 0.8 V minimum
Input high level threshold voltage: 2.4V maximum
Device will withstand ±30 V
Handshake line device: SN75185
Transmitter output voltage: ± 10.0 V minimum
Short circuit current: ±12 mA typical
Input low level threshold voltage: 0.65 V minimum
Input high level threshold voltage: 2.5V maximum
Device will withstand ±30 V