W83877TF Manuals

Winbond W83877TF I/O Chip Programming Manual

The W83877TF is an enhanced I/O chip from Winbond that integrates a floppy‑disk controller, two high‑speed UARTs (one with IrDA), multiple parallel‑port modes and extensive ACPI/legacy power‑management features. It supports up to five floppy‑drive capacities (360 KB‑2.88 MB) and a range of data‑transfer rates, while providing flexible IRQ and DMA handling for ISA/PCI systems.

The manual provides detailed register maps, including UART control and status registers, FIFO configuration, handshake control, and power‑management registers such as BIOS_EN, TMR_ON and General‑Purpose Event registers. It also lists pin‑to‑pin compatibility with the earlier W83877F part.

Covers: General Description · Register Address · UART Control Register (UCR) · UART Status Register (USR) · Handshake Control Register (HCR) · Handshake Status Register (HSR)