SC16C650A
Universal Asynchronous Receiver/Transmitter (UART)
with 32-byte FIFO and infrared (IrDA) encoder/decoder
Rev. 04 鈥?20 June 2003
Product data
1. General description
The SC16C650A 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 Mbits/s.
The SC16C650A 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 SC16C650A. Some of these added features are the 32-byte
receive and transmit FIFOs, automatic hardware or software 铿俹w control and infrared
encoding/decoding. The selectable auto-铿俹w control feature signi铿乧antly reduces
software overload and increases system ef铿乧iency while in FIFO mode by
automatically controlling serial data 铿俹w using RTS output and CTS input signals.
The SC16C650A 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 loop-back capability allows
on-board diagnostics.
The SC16C650A operates at 5 V, 3.3 V and 2.5 V, and the industrial temperature
range, and is available in plastic DIP40, PLCC44, and LQFP48 packages.
2. Features
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5 V, 3.3 V and 2.5 V operation
Industrial temperature range
After reset, all registers are identical to the typical 16C450 register set
Capable of running with all existing generic 16C450 software
Pin compatibility with the industry-standard ST16C450/550, TL16C450/550,
PC16C450/550
Up to 3 Mbits/s transmit/receive operation at 5 V, 2 Mbits/s at 3.3 V, and
1 Mbit/s at 2.5 V
32 byte transmit FIFO
32 byte receive FIFO with error 铿俛gs
Programmable auto-RTS and auto-CTS
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In auto-CTS mode, CTS controls transmitter
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In auto-RTS mode, RxFIFO contents and threshold control RTS
Automatic software/hardware 铿俹w control
Programmable Xon/Xoff characters
Software selectable Baud Rate Generator
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