Uart; Signal Descriptions; Figure 14. Uart Point-To-Point Topology; Table 12. Uart Signals - Intel Quark SE Series Platform Manual

UART

6.0 UART
UART is one of the hardware blocks in the Serial I/O (SIO).
The main features of the UART interface as follows:

Two 16550 compliant UART interfaces
 Supports baud rates from 300 to 2M with less than 2% frequency error
 Supports hardware and software flow control

FIFO mode support (16B TX and RX FIFOs)
 Supports HW DMA with configurable FIFO thresholds
 Supports 8-bit operation mode
 Supports RS485 and RS232

Supports DTR/DCD/DSR/RI Modem Control Pins through GPIO pins controlled
by software
6.1

Signal Descriptions

Table 12. UART Signals

Signal Name
UART_x_TXD
UART_x_RXD
UART_x_RTS
UART_x_CTS

Figure 14. UART Point-to-Point Topology

June 2017
Document Number: 334715-004EN
Direction/
Type
Output
Input
Output
Input
ATP SoC
UART_TXD/RXD/CTS/RTS
Description
UART A single-ended Transmit data (RS232 or
RS485). In RS485 mode, the differential driver is
outside the SoC.
UART A single-ended Receive data (RS232 or RS485).
In RS485 mode, the differential receiver is outside
the SoC.
UART A Request to send (RS232)
UART A Clear to send (RS232)
TL0 TL1
Intel® Quark™ SE Microcontroller C1000
UART
Device
Platform Design Guide
31