scc2681t NXP Semiconductors, scc2681t Datasheet
scc2681t
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scc2681t Summary of contents
Page 1
... SCC2681T Dual asynchronous receiver/transmitter (DUART) Product data INTEGRATED CIRCUITS 2004 Apr 06 ...
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... MOS-LSI communications device that provides two independent full-duplex asynchronous receiver/transmitter channels in a single package. The SCC2681T features a faster bus cycle time than the standard SCC2681. The quick bus cycle eliminates or reduces the need for wait states with fast CPUs and permits high throughput in I/O intensive systems ...
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... RECEIVE HOLDING REG (3) RECEIVE SHIFT REGISTER MRA1, 2 CRA SRA CHANNEL B (AS ABOVE) INPUT PORT CHANGE OF STATE DETECTORS (4) IPCR ACR OUTPUT PORT FUNCTION SELECT LOGIC OPCR OPR Figure 1. Block Diagram 3 Product data SCC2681T TxDA RxDA TxDB RxDB 7 IP0-IP6 8 OP0-OP7 V CC GND SD00099 ...
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... Channel B Receiver Serial Data Input: The least significant bit is received first. ‘Mark’ is HIGH, ‘space’ is LOW. 2004 Apr INTRN SCC2681TC1A44 23 n.c. 22 GND SD00737 Figure 2. Pin configuration NAME AND FUNCTION 4 Product data SCC2681T ...
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... A of current. CC pull-up device supplying current. CC pull-up device supplying current. CC pull-up device supplying current. CC pull-up device supplying current. CC pull-up device supplying current Product data SCC2681T pull-up CC ...
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... This product includes circuitry specifically designed for the protection of its internal devices from damaging effects of excessive static charge. Nonetheless suggested that conventional precautions be taken to avoid applying any voltages larger than the rated maxima. 2004 Apr 06 PARAMETER Product data SCC2681T RATING UNIT 0 to +70 C –65 to +150 C –0.5 to +6.0 ...
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... CMOS input levels – 0.2 V and Product data SCC2681T LIMITS UNIT UNIT Min Typ Max – – 0.8 V 2.0 – – V 2.5 – – V 0.8 V – – – – ...
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... Product data SCC2681T LIMITS UNIT UNIT Typ Max – – s – – ns – – ns – – ns – – ns – – ns – 100 ns – – ...
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... RLDA D0–D7 FLOAT (READ) CEN (WRITE) WRN D0–D7 (WRITE) 2004 Apr 06 t RES SD00028 Figure 3. Reset Timing t t RLRH t RHDF t RHDI INVALID VALID t EHEL t WLWH t DVWH t WHDI VALID Figure 4. Bus Timing 9 Product data SCC2681T = EHEL FLOAT SD00100 ...
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... This point represents noise margin that assures true switching has occurred. Beyond this level, the effects of external circuitry and M OL test environment are pronounced and can greatly affect the resultant measurement. 2004 Apr (a) INPUT PINS t PD OLD DATA (b) OUTPUT PINS Figure 5. Port Timing Figure 6. Interrupt Timing 10 Product data SCC2681T NEW DATA SD00101 V +0. SD00102 ...
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... TYPICAL CRYSTAL SPECIFICATION 2 – 4 MHz ): 12 – PARALLEL RESONANT, FUNDAMENTAL MODE Figure 7. Clock Timing 1 BIT TIME ( CLOCKS) t TXD t TCS Figure 8. Transmit t t RXS RXH 11 Product data SCC2681T + INTERNAL CLOCK DRIVERS SD00726 SD00103 SD00104 ...
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... Figure 9. Receive D2 D3 BREAK D3 START D4 STOP BREAK BREAK Figure 10. Transmitter Timing STATUS DATA D5 WILL BE LOST Figure 11. Receiver Timing 12 Product data SCC2681T WILL D6 NOT BE TRANSMITTED OPR( SD00094 D6, D7, D8 WILL BE LOST RESET BY COMMAND SD00105 ...
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... BIT 9 RxD 0 ADD#1 1 RECEIVER ENABLED RxRDY (SR0) RDN/WRN MR1(4– 2004 Apr 06 BIT 9 BIT MR1( ADD#2 BIT 9 BIT STATUS DATA ADD#1 D0 Figure 12. Wake-Up Mode 13 Product data SCC2681T BIT 9 ADD#2 1 BIT 9 BIT 9 ADD ADD#2 SD00106 ...
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... Philips Semiconductors Dual asynchronous receiver/transmitter (DUART) PLCC44: plastic leaded chip carrier; 44 leads 2004 Apr 06 14 Product data SCC2681T SOT187-2 ...
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... Relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). Fax: + 24825 Document order number: 15 Product data SCC2681T Koninklijke Philips Electronics N.V. 2004 All rights reserved. Printed in U.S.A. Date of release: 04-04 9397 750 12073 ...