Specifications

Ref# 420826 Intel
®
Atom™ processor CE4100 115
Platform Design Guide
Intel Confidential
8.7 UART Interface
There are two high-speed UART interfaces in the Intel
®
Atom™ processor CE4100. One is
used for debug purposes, and another may be used to drive the external low-speed modem
chip, which will transmit the billing information in STB applications. UART0 is full function
UART port, and may be connected to an external modem chip. UART1 is not full function;
only the RXD and TXD pins are bonded out.
The maximum baud rate supported in the UART is 921.6 Kbps.
I/O Name Type Description
UART0_RXD in Serial Data Input
UART0_TXD
out
Serial Data Output
UART0_CTS in Clear To Send
UART0_RTS
out
Request To Send
UART0_DSR in Data Set Ready
UART0_DCD in Data Carrier Detect
UART0_RI in Ring Indicator
UART0_DTR
out
Data Terminal Ready
UART1_RXD
In
Serial Data Input
UART1_TXD
Out
Serial Data Output