| Description |
W83877TG integrates the disk drive adapter, serial port (UART), IrDA 1.0 SIR, parallel port, configurable Plug-and-Play registers for the whole chip, ACPI / legacy power management, serial IRQ, and IRQ sharing.
W83877TG provides two high-speed serial communication ports (UARTs), one of which supports serial Infrared communication. Each UART includes a 16-byte send / receive FIFO, a programmable baud rate generator, complete modem control capability, and a processor interrupt system. 83877TG supports one PC-compatible printer port (SPP), Bi-directional printer port (BPP) and also Enhanced Parallel Port (EPP) and Extended Capabilities Port (ECP). Extension FDD Mode and Extension 2FDD Mode are also available through the printer port interface pins. This function is especially valuable for notebook computer applications.
W83877TG provides functions that comply with ACPI (Advanced Configuration and Power Interface), which includes support of legacy and ACPI power management through SMI or SCI function pins. One 24-bits power management timer is implemented with the carry notify interrupt. W83877TG also has auto power management mode to reduce the power consumption.
The serial IRQ for PCI architecture is supported, ISA IRQs (IRQ1~IRQ15) can be cascaded into one IRQSER pin. W83877TG also features ISA bus IRQ sharing and allows two or more devices to share the same IRQ pin. W83877TG is made to fully comply with Microsoft PC97 Hardware Design Guide. IRQs, DMAs, and I/O space resources are flexible to adjust to meet ISA PnP requirement. |
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