SCC2691 Philips Semiconductors, SCC2691 Datasheet
SCC2691
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SCC2691 Summary of contents
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... SCC2691 Universal asynchronous receiver/transmitter (UART) Product specification Supersedes data of 1995 May 01 IC19 Data Handbook Philips Semiconductors INTEGRATED CIRCUITS 1998 Sep 04 ...
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... Philips Semiconductors www.DataSheet4U.com Universal asynchronous receiver/transmitter (UART) DESCRIPTION The Philips Semiconductors SCC2691 Universal Asynchronous Receiver/Transmitter (UART single-chip CMOS-LSI communications device that provides a full-duplex asynchronous receiver/transmitter fabricated with Philips Semiconductors CMOS technology which combines the benefits of high density and low power consumption. ...
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... LOGIC CSR ACR CTUR CTLR Figure 2. Block Diagram 3 Product specification SCC2691 INDUSTRIAL DWG # V = +5V +10 – + SCC2691AE1N24 SOT222–1 SCC2691AE1A28 SOT261-3 SOT137-1 CHANNEL A TRANSMIT TxD HOLDING REG TRANSMIT SHIFT REGISTER RECEIVE HOLDING REG (3) RxD RECEIVE SHIFT REGISTER MR1 ...
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... CTCLK – Counter/timer external clock input. RTCLK – Receiver and/or transmitter external clock input. This may 16X clock as programmed by CSR[3:0] or CSR[7:4]. pull-up device supplying current. Pin has an internal Power Supply: +5V supply input. I Ground 4 Product specification SCC2691 ...
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... floated floated X1/CLK = V OUT X1/CLK = 0V OUT +70 C – + Product specification SCC2691 RATING UNIT Note 4 –65 to +150 –0 7.0 –0 +10% CC 300 mW CC LIMITS UNIT UNIT Min Typ Max 0 ...
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... Consecutive write operations to the command register require at least three rising edges of the X1 clock between writes. 8. These parameters are guaranteed by design, but are not 100% tested in production. 9. Operation to 0MHz is assured by design. Minimum test frequency is 2MHz. 1998 Sep PARAMETER PARAMETER Product specification SCC2691 LIMITS Min Typ Max 100 10 100 0 0 ...
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... MR = Mode register Status register THR = Tx holding register * See Table 6 for BRG Test frequencies in this data sheet, and “Extended baud rates for SCN2681, SCN68681, SCC2691, 1998 Sep 04 SCC2692, SCC68681 and SCC2698B” Philips Semiconductors ICs for Data Communications, IC-19, 1994. Mode registers 1 and 2 are accessed via an auxiliary pointer. The pointer is set to MR1 by RESET or by issuing a reset pointer command via the command register ...
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... The data in the FIFO remains valid until overwritten by another received character. Because of this, erroneous reading or extra reads of the receiver FIFO will miss-align the FIFO pointers and result in the reading of previously read data. A receiver reset will re-align the pointers. 8 Product specification SCC2691 ...
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... MR1[2] – Parity Type Select This bit selects the parity type (odd or even) if the with parity mode is programmed by MR1[4:3], and the polarity of the forced parity bit if the force parity mode is programmed. It has no effect if the no 9 Product specification SCC2691 ...
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... If an external 1X clock is used for the transmitter, MR2[ selects one stop bit and MR2[ selects two stop bits to be transmitted. 10 Product specification SCC2691 ...
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... CSR (Clock Select Register) Receiver Clock Select See Text See Table 6 for BRG Test frequencies in this data sheet, and “Extended baud rates for SCN2681, SCN68681, SCC2691, SCC2692, SCC68681 and SCC2698B” Philips Semiconductors ICs for Data Communications, IC-19, 1994. CR (Command Register) Miscellaneous Commands ...
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... MPI – 16X MPI–1X The receiver clock is always a 16X clock, except for CSR[7:4] = 1111. See “Extended baud rates for SCN2681, SCN68681, SCC2691, SCC2692, SCC68681 and SCC2698B” in application notes elsewhere in this publication CSR[7:4] – Receiver Clock Select This field selects the baud rate clock for the receiver as shown in Table 3 ...
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... ACR[3] – Power-Down Mode Select This bit, when set to zero, selects the power-down mode. In this mode, the SCC2691 oscillator is stopped and all functions requiring this clock are suspended. The contents of all registers are saved recommended that the transmitter and receiver be disabled prior ...
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... Philips Semiconductors www.DataSheet4U.com Universal asynchronous receiver/transmitter (UART) to placing the SCC2691 in this mode. Note that this bit must be set to a logic 1 after reset. When the power-down mode is enabled, internal circuitry forces the X1/CLK pin to the low state and the X2 pin to the high state ...
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... RESET t RES Figure 3. Reset Timing NOT VALID VALID VALID Figure 4. Bus Timing 15 Product specification SCC2691 SD00028 t RWD FLOAT t RWD SD00124 ...
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... FREQUENCY 2–4MHz X1 LOAD CAPACITANCE (C TYPE OF OPERATION . . . . . .PARALLEL RESONANT, FUND. MODE X2 Figure 7. Clock Timing 16 Product specification SCC2691 t PD SD00125 +0. +0. 3.6864MHz 20pF 24pF X1/CLK C1 Y1 SCC2691 50k to 150k C2 X2 TYPICAL CRYSTAL SPECIFICATION ). . . 20 or 32pF (typical) L SD00127 SD00126 ...
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... Philips Semiconductors www.DataSheet4U.com Universal asynchronous receiver/transmitter (UART) TxC (INPUT) TxD TxC (1X OUTPUT) (1X INPUT) 1998 Sep 04 1 BIT TIME ( CLOCKS) t TXD t TCS Figure 8. Transmit Timing RxC t t RXS RXH RxD Figure 9. Receive Timing 17 Product specification SCC2691 SD00092 SD00093 ...
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... Shown for ACR[2:] = 111 and MR1[ 1998 Sep BREAK D3 START D4 STOP BREAK BREAK Figure 10. Transmitter Timing STATUS D = DATA D5 WILL BE LOST Figure 11. Receiver Timing 18 Product specification SCC2691 WILL D6 NOT BE TRANSMITTED CR[7:4] = 1010 SD00128 RESET BY ...
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... It is during the start bit that the data in the transmit holding register is transferred to the transmit shift register. Non-standard baud rates are available as shown in Table 6 below, via the BRG Test function. 19 Product specification SCC2691 BIT 9 ADD#2 1 BIT 9 BIT 9 ...
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... Time out periods can be enabled using the counter/timer in the SCC2691, SCC2692, SCC2698B and SC68692 products. This monitoring can indicate a potential start bit corruption problem. ...
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... Philips Semiconductors www.DataSheet4U.com Universal asynchronous receiver/transmitter (UART) DIP24: plastic dual in-line package; 24 leads (300 mil) 1998 Sep 04 21 Product specification SCC2691 SOT222-1 ...
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... Philips Semiconductors www.DataSheet4U.com Universal asynchronous receiver/transmitter (UART) SO24: plastic small outline package; 24 leads; body width 7.5 mm 1998 Sep 04 22 Product specification SCC2691 SOT137-1 ...
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... Philips Semiconductors www.DataSheet4U.com Universal asynchronous receiver/transmitter (UART) PLCC28: plastic leaded chip carrer; 28 leads; pedestal 1998 Sep 04 23 Product specification SCC2691 SOT261-3 ...
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... Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088–3409 Telephone 800-234-7381 Philips Semiconductors 1998 Sep 04 [1] Copyright Philips Electronics North America Corporation 1998 Document order number: 24 Product specification SCC2691 All rights reserved. Printed in U.S.A. Date of release: 09-98 9397 750 04358 ...