24LCS22A-I/SN Microchip Technology, 24LCS22A-I/SN Datasheet
24LCS22A-I/SN
Specifications of 24LCS22A-I/SN
24LCS22A-I/SNG
24LCS22AI/SN
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24LCS22A-I/SN Summary of contents
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... SCL control byte is received, the device will revert to the Transmit-only mode after it receives 128 consecutive VCLK pulses while the SCL pin is idle. The 24LCS22A is available in standard 8-pin DIP and SOIC packages. The 24LCS22A features a flexible Write-Protect pin which is enabled by writing to address 7Fh (usually the checksum ® ...
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... ELECTRICAL CHARACTERISTICS (†) Absolute Maximum Ratings V .............................................................................................................................................................................7.0V CC All inputs and outputs w.r.t. V ......................................................................................................... -0. Storage temperature ...............................................................................................................................- +150 C Ambient temperature with power applied ................................................................................................- +125 C ESD protection on all pins † Notice: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device ...
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... Units Conditions kHz 2.5V V 5.5V CC 4. 2.5V V 5.5V CC 4. 2.5V V 5.5V CC 4. ...
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... FUNCTIONAL DESCRIPTION The 24LCS22A is designed to comply to the DDC Standard proposed by VESA (Figure 3-3) with the exception that it is not Access.bus capable. It operates in two modes, the Transmit-only mode (1K-bit) and the Bidirectional mode (2K-bit). There is a separate 2-wire protocol to support each mode, each having a separate clock input but sharing a common data line (SDA) ...
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... Bidirectional mode clock (SCL), controls access to the bus and generates the Start and Stop conditions, while the 24LCS22A acts as the slave. Both master and slave can operate as transmitter or receiver, but the master device determines which mode is activated. In the Bidirectional mode, the 24LCS22A only responds to commands for device 1010 000X ...
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... VESA’s Display Data Channel (DDC) Standard Proposal ver. 2p rev. 0, used by permission of VESA. 2: The dash box and text “The 24LCS21A and... inside dash box.” are added by Microchip Technology Inc. 3: Vsync signal is normally used to derive a signal for VCLK pin on the 24LCS22A. DS21682B-page 6 ...
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... Note: Once switched into Bidirectional mode, the 24LCS22A will remain in that mode until power is removed. Removing power is the only way to reset the 24LCS22A into the Transmit-only mode. 3.1.5 ACKNOWLEDGE Each receiving device, when addressed, is obliged to generate an acknowledge after the reception of each byte ...
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... After generating a Start condition, the bus master transmits the slave address consisting of a 7-bit device code (1010000) for the 24LCS22A. The eighth bit of slave address determines whether the master device wants to read or write to the 24LCS22A (Figure 3-7). The 24LCS22A monitors the bus for its corresponding slave address continuously ...
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... Page Write The write control byte, word address and the first data byte are transmitted to the 24LCS22A in the same way byte write. But instead of generating a Stop condition the master transmits up to eight data bytes to the 24LCS22A which are temporarily stored in the on- chip page buffer and will be written into the memory after the master has transmitted a Stop condition ...
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... FIGURE 4-1: BYTE WRITE BUS ACTIVITY R MASTER T SDA LINE S BUS ACTIVITY VCLK FIGURE 4-2: VCLK WRITE ENABLE TIMING SCL SDA IN VCLK T VHST DS21682B-page 10 CONTROL WORD BYTE ADDRESS STA SU STO S T DATA SPVL 2003 Microchip Technology Inc. ...
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... A C BUS ACTIVITY K VCLK 2003 Microchip Technology Inc. FIGURE 5-1: WORD DATA ADDRESS DATA ( 24LCS22A ACKNOWLEDGE POLLING FLOW Send Write Command Send Stop Condition to Initiate Write Cycle Send Start Send Control Byte with R Did Device Acknowledge (ACK = 0)? Yes Next Operation ...
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... Then the master issues the control byte again but with the R/W bit set to a one. The 24LCS22A will then issue an acknowledge and transmits the 8-bit data word. The master will not acknowledge the transfer but does generate a Stop condition and the 24LCS22A discontinues transmission (Figure 7-2) ...
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... Sequential Read Sequential reads are initiated in the same way as a random read except that after the 24LCS22A transmits the first data byte, the master issues an acknowledge as opposed to a Stop condition in a random read. This directs the 24LCS22A to transmit the next sequentially addressed 8-bit word (Figure 7-3) ...
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... No Internal Connection 8.1 Write -Protect (WP) This pin is used for flexible write protection of the 24LCS22A. When memory location 7Fh is written with any data, this pin is enabled and determines the write capability of the 24LCS22A (Table 6-1). The WP pin has an internal pull up resistor which will allow write capability (assuming VCLK = 1) at all times if this pin is floated ...
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... Standard marking consists of Microchip part number, year code, week code, traceability code (facility code, mask rev#, and assembly code). 2003 Microchip Technology Inc. 24LCS22A Example: 24LCS22A I/PNNN 0145 Example: 24LCS22A I/SN0145 NNN DS21682B-page 15 ...
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... Plastic Dual In-line (P) – 300 mil (PDIP Dimension Limits Number of Pins Pitch Top to Seating Plane Molded Package Thickness Base to Seating Plane Shoulder to Shoulder Width Molded Package Width Overall Length Tip to Seating Plane Lead Thickness Upper Lead Width Lower Lead Width ...
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... L .019 .025 .030 .008 .009 .010 B .013 .017 .020 24LCS22A A2 MILLIMETERS MIN NOM MAX 8 1.27 1.35 1.55 1.75 1.32 1.42 1.55 0.10 0.18 0.25 5.79 6.02 6.20 3.71 3.91 3.99 4.80 4.90 5.00 0.25 0.38 ...
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... APPENDIX A: REVISION HISTORY Revision B Corrections to Section 1.0, Electrical Characteristics. DS21682B-page 18 2003 Microchip Technology Inc. ...
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... Microchip's development systems software products. Plus, this line provides information on how customers ® ® can receive the most current upgrade kits. The Hot Line or Microsoft Numbers are: 1-800-755-2345 for U.S. and most of Canada, and 1-480-792-7302 for the rest of the world. 24LCS22A 042003 DS21682B-page 19 ...
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... Telephone: (_______) _________ - _________ Application (optional): Would you like a reply? Y Device: 24LCS22A Questions: 1. What are the best features of this document? 2. How does this document meet your hardware and software development needs you find the organization of this document easy to follow? If not, why? 4 ...
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... New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products. 2003 Microchip Technology Inc. 24LCS22A . Examples: a) 24LCS22A-I/P: Industrial temperature, PDIP package. b) 24LCS22A-I/SN: Industrial temperature, SOIC package. c) 24LCS22AT-I/SN:Tape and Reel, Industrial temperature, SOIC package. DS21682B-page 21 ...
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... NOTES: DS21682B-page 22 2003 Microchip Technology Inc. ...
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... Serialized Quick Turn Programming (SQTP service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2003, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received QS-9000 quality system ...
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... Via Quasimodo, 12 20025 Legnano (MI) Milan, Italy Tel: 39-0331-742611 Fax: 39-0331-466781 Netherlands Biesbosch 14 NL-5152 SC Drunen, Netherlands Tel: 31-416-690399 Fax: 31-416-690340 United Kingdom 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44-118-921-5869 Fax: 44-118-921-5820 07/28/03 2003 Microchip Technology Inc. ...