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1.7 Serial Header
The C9Z790-CG/-CGW motherboard supports one serial communication connection. The
COM header can be used for input/output. The UART provides legacy speeds with a baud
rate of up to 115.2 Kbps as well as an advanced speed with baud rates of 250 K, 500 K, or
1 Mb/s, which support high-speed serial communication devices.
1.8 Super I/O
The Super I/O supports one high-speed, 16550 compatible serial communication port (UART).
Each UART includes a 16-byte send/receive FIFO, a programmable baud rate generator,
complete modem control capability and a processor interrupt system. The UART provides
legacy speed with a baud rate of up to 115.2 Kbps as well as an advanced speed with baud
rates of 250 K, 500 K, or 1 Mb/s, which support higher speed modems.
The Super I/O provides functions that comply with Advanced Configuration and Power Interface
(ACPI), which includes support of legacy and ACPI power management through an SMI or
SCI function pin. It also features auto power management to reduce power consumption.
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Chapter 1: Introduction
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