Features: in compatible with SC16C654IA68 and SC16C554IA68 with additional nhancements
Up to 5 Mbits/s baud rate (at 3.3 V and 5 V; at 2.5 V maximum baud rate is 3 Mbits/s)
64-byte transmit FIFO
64-byte receive FIFO with error flags
Programmable and selectable transmit and receive FIFO trigger levels for DMA and interrupt generation
Software/hardware flow control
Programmable Xon/Xoff characters
Programmable auto-RTS and auto-CTS
Optional data flow resume by Xon any character
DMA signalling capability for both received and transmitted data
Supports 5 V, 3.3 V and 2.5 V operation
Software selectable baud rate generator
Prescaler provides additional divide-by-4 function
Fast databus access time
Programmable sleep mode
Programmable serial interface characteristics
5, 6, 7, or 8-bit characters
Even, odd, or no parity bit generation and detection
1, 1.5, or 2 stop bit generation
False start bit detection
Complete status reporting capabilities in both normal and sleep mode
Line break generation and detection
nternal test and loop-back capabilities
Fully prioritized interrupt system controls
Modem control functions (CTS , RTS, DSR , DTR, RI, and CD).Pinout
Specifications
| Symbol |
Parameter |
Conditions |
Min |
Max |
Unit |
| VCC |
supply voltage |
|
- |
7 |
V |
| VI |
input voltage |
|
-0.3 |
VCC + 0.3 |
V |
| VO |
output voltage |
|
-0.3 |
VCC + 0.3 |
V |
| Tamb |
operating ambient temperature |
in free-air |
-40 |
+85 |
|
| Tstg |
storage temperature |
|
-65 |
+150 |
|
DescriptionThe SC16C754 is a quad universal asynchronous receiver/transmitter (UART) with 64-byte FIFOs, automatic hardware/software flow control, and data rates up to 5 Mbits/s (3.3 V and 5 V). The SC16C754 offers enhanced features. It has a transmission control register (TCR) that stores receiver FIFO threshold levels to start/stop transmission during hardware and software flow control. With the FIFO RDY register, the software gets the status of TXRDY/ RXRDYfor all four ports in one access. On-chip 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 UART transmits data,sent to it over the peripheral 8-bitbus,onthe TX signal and receives characters on the RX signal. Characters can be programmed to be,6,7,or 8 bits. The UART has a 64-byte receive FIFO and transmit FIFO and can be programmed to interrupt at different trigger levels. The UART generates its own desired baud rate based upon a programmable divisor and its input clock. It can
transmit even, odd, or no parity and 1, 1.5, or 2 stop bits. The receiver can detect break, idle, or framing errors, FIFO overflow, and parity errors. The transmitter can detect FIFO underflow. The UART also contains a software interface for modem control operations, and has software flow control and hardware flow control capabilities.
The SC16C754 is available in plastic LQFP80 and PLCC68 packages.
SC16C754 Data Sheet
