600 Series Chipset Family Platform Controller Hub

Datasheet, Volume 1 of 2

ID 648364
Date 05/10/2022
Document Table of Contents

ISH UART Controller

The ISH has two UART ports, each comprised of a four-wire, bi-directional point-to-point connection between the ISH and a peripheral.

The UART has the following capabilities:

  • Support for operating speeds up to 4 Mbps
  • Support for auto flow control using the RTS#/CTS# signals
  • 64-byte FIFO
  • DMA support to allow direct transfer to the ISH local SRAM without intervention by the controller. This saves interrupts on packets that are longer than the FIFO or when there are back-to-back packets to send or receive.