1. General description
The SC16C850 is a 2.5 V to 3.3 V, low power, single 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 SC16C850 is functionally (software) compatible with
the SC16C650B. SC16C850 can be programmed to operate in extended mode (see
Section 6.2
) where additional advanced UART features are available. The SC16C850
UART provides enhanced UART functions with 128-byte FIFOs, modem control interface,
and IrDA encoder/decoder. 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.
The SC16C850IBS with Intel (16 mode) or Motorola (68 mode) bus host interface
operates at 2.5 V to 3.3 V and is available in a very small (Micro-UART) HVQFN32
package.
The SC16C850IET with Intel (16 mode) bus host interface operates at 2.5 V to 3.3 V and
is available in a very small TFBGA36 package.
2. Features and benefits
Single channel high performance UART
Intel or Motorola bus interface selectable using 16/68
pin
2.5 V to 3.3 V operation
Up to 5 Mbit/s data rate
128-byte transmit FIFO to reduce the bandwidth requirement of the external CPU
128-byte receive FIFO with error flags to reduce the bandwidth requirement of the
external CPU
128 programmable Receive and Transmit FIFO interrupt trigger levels
128 Receive and Transmit FIFO reporting levels (level counters)
Automatic software (Xon/Xoff) and hardware (RTS
/CTS or DTR/DSR) flow control
Industrial temperature range (−40 °C to +85 °C)
128 hardware and software trigger levels
Automatic 9-bit mode (RS-485) address detection
Automatic RS-485 driver turn-around with programmable delay
UART software reset
High resolution clock prescaler, from 0 to 15 with granularity of
1
⁄
16
to allow
non-standard UART clock to be used
SC16C850
2.5 V to 3.3 V UART, 5 Mbit/s (max.) with 128-byte FIFOs,
infrared (IrDA), and 16 mode or 68 mode parallel bus interface
Rev. 2 — 11 November 2010 Product data sheet
