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 Trans- mit-Only mode after it receives 128 consecutive VCLK pulses while the SCL pin is idle. The 24LCS22A is avail- able in standard 8-pin PDIP 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 ...............................................................................................................................-65°C to +150°C Ambient temperature with power applied ................................................................................................-40°C to +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 2.5V ≤ V ≤ 5.5V kHz CC 4.5V ≤ V ≤ 5.5V CC 2.5V ≤ V ≤ 5. 4.5V ≤ V ≤ 5.5V CC 2.5V ≤ V ≤ 5. 4.5V ≤ V ≤ ...
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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 oper- ates in two modes, the Transmit-Only mode (1 Kbit) and the Bidirectional mode (2 Kbit). 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 ‘ ...
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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 24LCS22A 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. ...
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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 DS21682E-page 10 Word Control Address Byte STA SU STO S T Data SPVL © 2009 Microchip Technology Inc. ...
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... Bus Activity K VCLK © 2009 Microchip Technology Inc. FIGURE 5-1: Write Command Initiate Write Cycle Send Control Byte Word Data Address Data ( 24LCS22A ACKNOWLEDGE POLLING FLOW Send Send Stop Condition to Send Start with R Did Device Acknowledge (ACK = 0)? Yes Next Operation Data ...
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... Address Pointer is set. 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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... 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). 8.2 Serial Address/Data Input/Output (SDA) This pin is used to transfer addresses and data into and out of the device, when the device is in the Bidirectional mode ...
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... Standard marking consists of Microchip part number, year code, week code, traceability code (facility code, mask rev#, and assembly code). © 2009 Microchip Technology Inc. 24LCS22A Example: 24LCS22A e I/P NNN 3 0145 Example: 4LCS22AI ...
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... DS21682E-page 16 PLO %RG\ >3',3@ © 2009 Microchip Technology Inc. ...
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... Microchip Technology Inc. 24LCS22A PP %RG\ >62,&@ α φ β DS21682E-page 17 ...
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... DS21682E-page 18 PP %RG\ >62,&@ © 2009 Microchip Technology Inc. ...
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... REVISION HISTORY Revision B Corrections to Section 1.0, Electrical Characteristics. Revision C Revised Section 8.1. Added new package legend. Revision D (07/2008) Revised Features (added Pb-free); Replaced Package Drawings (Rev. AP); Revised Product ID System. Revision E (06/2009) Revised Package Marking examples. © 2009 Microchip Technology Inc. 24LCS22A DS21682E-page 19 ...
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... NOTES: DS21682E-page 20 © 2009 Microchip Technology Inc. ...
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... Customers representative or field application engineer (FAE) for support. Local sales offices are also available to help customers. A listing of sales offices and locations is included in the back of this document. Technical support is available through the web site at: http://support.microchip.com 24LCS22A should contact their distributor, DS21682E-page 21 ...
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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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... Package Plastic DIP (300 mil Body), 8-Lead SN = Plastic SOIC (3.90 mm Body), 8-Lead © 2009 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. DS21682E-page 23 ...
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... NOTES: DS21682E-page 24 © 2009 Microchip Technology Inc. ...
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... PICDEM, PICDEM.net, PICtail, PIC Select Mode, Total Endurance, TSHARC, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...
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... Fax: 886-3-6578-370 Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 © 2009 Microchip Technology Inc. EUROPE Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 ...