Philips SCC2691

Philips Semiconductors Product data sheet

SCC2691Universal asynchronous receiver/transmitter (UART)

2006 Aug 04 17

tTXD

tTCS

1 BIT TIME

(1 OR 16 CLOCKS)

TxD

TxC

(INPUT)

TxC

(1X OUTPUT)

SD00092

Figure 8. Transmit Timing

tRXS tRXH

RxC

(1X INPUT)

RxD

SD00093

Figure 9. Receive Timing

Contents

Main SCC2691Universal asynchronous receiver/transmitter (UART) DESCRIPTION FEATURES ORDERING INFORMATION Figure 2. Block Diagram COMMERCIAL INDUSTRIAL PACKAGES VCC = +5V +10%, TA = 0C to +70CVCC = +5V +10%, BLOCK DIAGRAM SD00123 PIN DESCRIPTION ABSOLUTE MAXIMUM RATINGS DC ELECTRICAL CHARACTERISTICS SCC2691Universal asynchronous receiver/transmitter (UART) AC ELECTRICAL CHARACTERISTICS BLOCK DIAGRAM SCC2692, SCC68681 and SCC2698B Data Bus Buffer Extended baud rates for SCN2681, SCN68681, SCC2691, Interrupt Control Receiver and Transmitter RECEIVER FIFO Receiver Status Bits Receiver Reset and Disable SCC2691Universal asynchronous receiver/transmitter (UART) MULTI-PURPOSE INPUT PIN MULTI-PURPOSE OUTPUT PIN REGISTERS MR1 Mode Register 1 MR2 Mode Register 2 Table 2. Register Bit Formats MR2 (Mode Register 2) Channel Mode TxRTS Control CTS Enable Tx Stop Bit Length* CSR (Clock Select Register) Extended baud rates for SCN2681, SCN68681, SCC2691, SCC2692, SCC68681 and SCC2698B Table 2. Register Bit Formats (Continued) CTUR (Counter/Timer Upper Register) CSR Clock Select Register (see Table 6. also) Table 3. Baud Rate Selection Extended baud rates for SCN2681, SCN68681, SCC2691, SCC2692, SCC68681 and SCC2698B CR Command Register SR Channel Status Register ACR Auxiliary Control Register Table 4. ACR[6:4] Operating Mode Table 5. BRG Characteristics ISR Interrupt Status Register IMR Interrupt Mask Register CTUR and CTLR Counter/Timer Registers Page Page 2006 Aug 04 18 SD00128 Figure 11. Receiver Timing Figure 10. Transmitter Timing SD00129 The CTS, RTS, CTS Enable Tx signals Transmitter Disable Note Table 6. Baud Rates Extended Extended baud rates for SCN2681, SCN68681, SCC2691, SCC2692, SCC68681 and SCC2698B Receiver Reset in the Normal Mode (Receiver Enabled) Receiver Reset in the Wake-Up Mode (MR1[4:3] = 11) Page Page Page Page yyyy mmm dd 25 Data sheet status Document status Product status[3] Definition Contact information Legal Information