TL16C754BPNR

四通道UART，具有64字节FIFO QUAD UART WITH 64-BYTE FIFO

description

The TL16C754B is a quad universal asynchronous receiver/transmitter UART with 64-byte FIFOs, automatic hardware/software flow control, and data rates up to 3 Mbps. The TL16C754B offers enhanced features. It has a transmission control register TCR that stores received FIFO threshold level to start/stop transmission during hardware and software flow control. With the FIFO RDY register, the software gets the status of TXRDY/RXRDY for 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 loopback capability allows onboard diagnostics.

• ST16C654 Pin Compatible With Additional Enhancements

• Supports Up To 24-MHz Crystal Input Clock 1.5 Mbps

• Supports Up To 48-MHz Oscillator Input Clock 3 Mbps for 5-V Operation

• Supports Up To 32-MHz Oscillator Input Clock 2 Mbps for 3.3-V Operation

• 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

• Programmable Receive FIFO Trigger Levels for Software/Hardware Flow Control

• 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 3.3-V or 5-V Supply

• Characterized for Operation From −40°C to 85°C

• Software Selectable Baud Rate Generator

• Prescalable Provides Additional Divide by 4 Function

• Fast Access 2 Clock Cycle IOR/IOW Pulse Width

• 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

• Internal Test and Loopback Capabilities

• Fully Prioritized Interrupt System Controls

• Modem Control Functions CTS, RTS, DSR, DTR, RI, and CD