Intel® 500 Series Chipset Family On-Package PCH Datasheet Volume 1

Datasheet

ID 631119
Date 13/07/2021 00:00:00
Public Content
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.