The ITU document O.153 paragraph 2.1 indicates the BERT pattern can be used at data rates up to 14.4 Kbps. However, the Sealevel WinSSD utility allows the BERT pattern to be used at all available data rates and supported communication modes, including those…

The Cyclic Redundancy Check (CRC) is a check value used to detect transmission errors in a frame or block of data. The transmitter encodes the calculated CRC value and appends it to the data transmitted. The receiver decodes the calculated CRC value and compares…

The CRC-CCITT polynomial value used in the Zilog Z16C32 is: x16 + x12 + x5 + 1 The corresponding hexadecimal value is 0x1021.

The CRC-CCITT polynomial value used in the Zilog Z85230 is: x16 + x12 + x11 + x10 + x8 + x3 + x2 + x1 + 1 The corresponding hexadecimal value is 0x1D0F.

The Z16C32 operates similar to a UART and transmits the least significant bit first. The only exception is when the card is operating in SDLC/HDLC mode with CRC enabled. The CRC is transmitted most significant bit first and all other serial data is transmitted…

The Zilog 16C32-based 3514 and 5104 have 256 K of memory on the adapters that are used for buffering the input and output data. To aid in transfer efficiency, the Windows SeaMAC V4 driver conducts 32-bit transfers from the adapters’ memory to the system…

Manchester clock encoding (also known as split phase or bi-phase level encoding) always produces a transition at the center of the bit cell. Sealevel synchronous serial adapters with the Zilog Z85230 chipset family can receive Manchester encoded data, but…

Sealevel synchronous serial adapters are capable of a constant output stream if the application program can provide a constant stream of serial data. If you are using either blocking (normal) I/O or overlapped I/O with only one write active at a time, then…

Sealevel synchronous serial adapters support the three most common non-encoded clocking modes: The Sealevel serial adapter provides the clock using the baud rate generator (BRG) that will be used by the other serial device for transmitting and receiving.…