SC16C650B Datasheet, PDF (1/48 Pages) NXP Semiconductors – 5 V, 3.3 V and 2.5 V UART with 32-byte FIFOs and infrared (IrDA) encoder/decoder

SC16C650B
5 V, 3.3 V and 2.5 V UART with 32-byte FIFOs and infrared
(IrDA) encoder/decoder
Rev. 04 — 14 September 2009
Product data sheet
1. General description
The SC16C650B is a 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 3 Mbit/s.
The SC16C650B is pin compatible with the ST16C650A and it will power-up to be
functionally equivalent to the 16C450. Programming of control registers enables the
added features of the SC16C650B. Some of these added features are the 32-byte receive
and transmit FIFOs, automatic hardware or software flow control and infrared
encoding/decoding. The selectable auto-flow control feature significantly reduces software
overload and increases system efficiency while in FIFO mode by automatically controlling
serial data flow using RTS output and CTS input signals. The SC16C650B also provides
DMA mode data transfers through FIFO trigger levels and the RXRDY and TXRDY
signals. On-board status registers provide the user with error indications, operational
status, and modem interface control. System interrupts may be tailored to meet user
requirements. An internal loopback capability allows on-board diagnostics.
The SC16C650B operates at 5 V, 3.3 V and 2.5 V, and the industrial temperature range,
and is available in plastic PLCC44, LQFP48, and HVQFN32 packages.
2. Features
I Single channel
I 5 V, 3.3 V and 2.5 V operation
I 5 V tolerant on input only pins¹
I Industrial temperature range (−40 °C to +85 °C)
I After reset, all registers are identical to the typical 16C450 register set
I Capable of running with all existing generic 16C450 software
I Pin compatibility with the industry-standard ST16C450/550, TL16C450/550,
PC16C450/550. Software compatible with ST16C650.
I Up to 3 Mbit/s transmit/receive operation at 5 V, 2 Mbit/s at 3.3 V, and 1 Mbit/s at 2.5 V
I 32 byte transmit FIFO
I 32 byte receive FIFO with error flags
I Programmable auto-RTS and auto-CTS
N In auto-CTS mode, CTS controls transmitter
N In auto-RTS mode, RX FIFO contents and threshold control RTS
I Automatic software/hardware flow control
1. For data bus pins D7 to D0, see Table 26 “Limiting values”.