PC87322VF

The PC87322VF incorporates a Floppy Disk Controller (FDC), two full function UARTs, an enhanced parallel port, and IDE interface control logic in one chip. The PC87322VF includes standard AT address decoding for on-chip functions and a Configuration Register set, offering a single chip solution to the most commonly used ISA, EISA and Micro- ChannelÉ peripherals.

The on-chip FDC is software compatible to the PC8477, which contains a superset of the mDP8473 and NEC mPD765 and the N82077 floppy disk controller functions. The on-chip analog data separator requires no external components and supports the 4 MB drive format as well as the other standard floppy drives used with 5.25× and 3.5× media. Automatic media sense support is provided. In the PC87322VF the UARTs are equivalent to two NS16450s or PC16550s. The bidirectional parallel port maintains complete compatibility with the ISA, EISA and MicroChannel parallel ports. The enhanced parallel port is compatible with the IEEE 1284 standard, and also supports EPP Ver 1.7.

The IDE control logic provides a complete IDE interface, with DMA support, except for the signal buffers. The Configuration Registers consist of five byte-wide registers. An Index and a Data Register which can be relocated within the ISA I/O address space access the Configuration Registers.