
Intel
®
Atom™ Processor E660 with Intel
®
Platform Controller Hub EG20T Development Kit
January 2012
User Manual
Document Number: 324213-002
23
Getting Started
2.5.11
UART
The carrier board provides five UART ports for use in the system.
Four UART ports are provided from the Intel
®
PCH EG20T and one UART interface is
provided from the SIO (SMSC LPC47M172*). The features of these ports are as follows:
• Intel
®
PCH EG20T UART feature:
— UART port 0:
— Assigned rear I/O panel’s D-Sub 9pin stacked connector (X19) via a RS-
232C transceiver MAXIM MAX3* or via two RS485 transceivers
MAXIM MAX3076EESD*. The alternate selection is done by switches (SW1-
SW3) and jumpers (J16-J21) on the board. UART0 is connected to a 2x5
2.54mm pin header (X46) directly.
— Standard 16550 Compatible UART with Send/Receive 256-Byte FIFOs
— The receive FIFO generates 3-bit error data per byte
— Supports 300k and 4Mbps Baud Rate but X19 port supports up to 1Mbps
following RS-232C transceiver’s specification.
— Programmable Baud Rate Generator
— Enables auto hardware flow control of the Intel
®
PCH EG20T
— UART port 1-3:
— Assigned rear I/O panel’s D-Sub 9pin stacked connectors (X17; UART2,
X18; UART1) via a RS-232C transceiver MAXIM MAX3*. UART3 is
connected to a 2x5 2.54mm pin header (X40) directly.
— Standard 16550 Compatible UART with Send/Receive 64-Byte FIFOs
— The receive FIFO generates 3-bit error data per byte
— Supports 300k and 1Mbps Baud Rate
— Programmable Baud Rate Generator
— SIO (SMSC LPC47M172*)‘s UART feature:
— Assigned rear I/O panel’s D-Sub 9pin stacked connector (X16) via a RS-
232C transceiver MAXIM MAX3*.
— High Speed 16C550A Compatible UART with Send/Receive 16-Byte FIFOs
— Supports 230k and 460k Baud Rate
— Programmable Baud Rate Generator
and
describe the carrier board UART interface connection.