1. General description
The SC16C852 is a 2.5 V to 3.3 V, low power, dual channel Universal Asynchronous
Receiver and Transmitter (UART) used for serial data communications. Its principal
function is to convert parallel data into serial data and vice versa. The UART can handle
serial data rates up to 5 Mbit/s. The SC16C852 is pin compatible with the SC16C652B.
SC16C852 can be programmed to operate in extended mode (see Section 6.2) where
additional advanced UART features are available. The SC16C852 UART provides
enhanced UART functions with 128-byte FIFOs, modem control interface, DMA mode
data transfer, and IrDA encoder/decoder. The DMA mode data transfer is controlled by the
FIFO trigger levels and the TXRDY and RXRDY signals. On-board status registers provide
the user with error indications and operational status. System interrupts and modem
control features may be tailored by software to meet specific user requirements. An
internal loopback capability allows on-board diagnostics. Independent programmable
baud rate generators are provided to select transmit and receive baud rates.
The SC16C852 with Intel (16 mode) or Motorola (68 mode) bus host interface operates at
2.5 V to 3.3 V and is available in plastic LQFP48 and very small (Micro-UART) HVQFN32
packages.
2. Features
n Dual channel high performance UART
n Intel or Motorola bus interface selectable using 16/68 pin
n 2.5 V to 3.3 V operation
n Up to 5 Mbit/s data rate
n 128-byte transmit FIFO to reduce the bandwidth requirement of the external CPU
n 128-byte receive FIFO with error flags to reduce the bandwidth requirement of the
external CPU
n 128 programmable Receive and Transmit FIFO interrupt trigger levels
n 128 Receive and Transmit FIFO reporting levels (level counters)
n Automatic software (Xon/Xoff) and hardware (RTS/CTS or DTR/DSR) flow control
n Industrial temperature range (−40 °C to +85 °C)
n Pin, function, and software compatible to SC16C652B in LQFP48 package
n 128 hardware and software trigger levels
n Automatic 9-bit mode (RS-485) address detection
n Automatic RS-485 driver turn-around with programmable delay
n Dual channel concurrent write
n UART software reset
SC16C852
2.5 V to 3.3 V dual UART, 5 Mbit/s (max.) with 128-byte FIFOs,
infrared (IrDA) and 16 mode or 68 mode bus interface
Rev. 01 — 31 August 2009 Product data sheet
