23a640 Microchip Technology Inc., 23a640 Datasheet
23a640
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23a640 Summary of contents
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... SI Serial Data Input SCK Serial Clock Input HOLD Hold Input V Supply Voltage CC © 2009 Microchip Technology Inc. 23A640/23K640 Page Size Temp. Ranges 32 Byte I 32 Byte I Description: The Microchip Technology Inc. 23X640 are 64 Kbit Serial SRAM devices. The memory is accessed via a simple Serial Peripheral Interface (SPI) compatible serial bus ...
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... V can be lowered without losing RAM data. This parameter is periodically Preliminary +0.3V CC Test Conditions 23A640 23K640 -400 μ OUT SS OR ...
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... — Preliminary 23A640/23K640 Test Conditions = Note 1 Note ...
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... FIGURE 1-1: HOLD TIMING CS 15 SCK HOLD FIGURE 1-2: SERIAL INPUT TIMING CS 2 SCK MSB in High-Impedance SO FIGURE 1-3: SERIAL OUTPUT TIMING SCK 12 MSB out SO SI DS22126B-page High-Impedance n Don’t Care LSB in 13 Don’ ...
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... Figure 2-2). Page Operation – is selected when bits 7 and 6 in the STATUS register are set to 10. The 23A640/23K640 has 1024 pages of 32 Bytes. In this mode, the read and write operations are limited to within the addressed page (the address is automatically incremented internally) ...
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... TABLE 2-1: INSTRUCTION SET Instruction Name Instruction Format READ 0000 0011 WRITE 0000 0010 RDSR 0000 0101 WRSR 0000 0001 FIGURE 2-1: BYTE READ SEQUENCE SCK Instruction High-Impedance SO FIGURE 2-2: BYTE WRITE SEQUENCE ...
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... Address Page X, Word Y Page X, Word Preliminary 23A640/23K640 Page X, Word Page X, Word Page X, Word ...
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... FIGURE 2-5: SEQUENTIAL READ SEQUENCE SCK Instruction SCK SI Page X, Word SCK SI Page X+1, Word DS22126B-page 16-bit Address ...
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... Microchip Technology Inc 16-bit Address Data Byte Preliminary 23A640/23K640 Data Byte Data Byte DS22126B-page 9 ...
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... Read Status Register Instruction (RDSR) The Read Status Register instruction (RDSR) provides access to the STATUS register. The STATUS register may be read at any time. The STATUS register is formatted as follows: TABLE 2-2: STATUS REGISTER W/R W/R – – – – MODE MODE ...
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... SI SO 2.7 Power-On State The 23X640 powers on in the following state: • The device is in low-power Standby mode ( • A high-to-low-level transition required to enter active state © 2009 Microchip Technology Inc. 23A640/23K640 Data to STATUS Register ...
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... PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE PDIP/SOIC Name Function TSSOP CS 1 Chip Select Input SO 2 Serial Data Output V 4 Ground Serial Data Input SCK 6 Serial Clock Input HOLD 7 Hold Input V 8 Supply Voltage CC 3 ...
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... Note: In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. © 2009 Microchip Technology Inc. 23A640/23K640 Example: 23K640 e 3 I/P ...
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... DS22126B-page 14 PLO %RG\ >3',3@ Preliminary © 2009 Microchip Technology Inc. ...
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... Microchip Technology Inc. 23A640/23K640 PP %RG\ >62,&@ α φ β Preliminary DS22126B-page 15 ...
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... DS22126B-page 16 PP %RG\ >62,&@ Preliminary © 2009 Microchip Technology Inc. ...
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... Microchip Technology Inc. 23A640/23K640 PP %RG\ >76623@ I Preliminary φ DS22126B-page 17 ...
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... APPENDIX A: REVISION HISTORY Revision A (12/2008) Original Release. Revision B (01/2009) Revised Section 2.5: Added a paragraph. DS22126B-page 18 Preliminary © 2009 Microchip Technology Inc. ...
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... To register, access the Microchip web site at www.microchip.com, click on Customer Change Notification and follow the registration instructions. © 2009 Microchip Technology Inc. 23A640/23K640 CUSTOMER SUPPORT Users of Microchip products can receive assistance through several channels: • Distributor or Representative • ...
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... Telephone: (_______) _________ - _________ Application (optional): Would you like a reply? Y Device: 23A640/23K640 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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... Plastic PDIP (300 mil body), 8-lead SN = Plastic SOIC (3.90 mm body), 8-lead ST = TSSOP, 8-lead © 2009 Microchip Technology Inc. /XX X Examples: Package a) b) Preliminary 23A640/23K640 . 23K640-I/ST = 64k-bit, 3.6V Serial SRAM, Industrial temp., TSSOP package 23A640T-I/SN = 64k-bit, 1.8V Serial SRAM, Industrial temp., Tape & Reel, SOIC package DS22126B-page 21 ...
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... NOTES: DS22126B-page 22 Preliminary © 2009 Microchip Technology Inc. ...
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... Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights. © 2009 Microchip Technology Inc. Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC, K ...
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... 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 Preliminary © 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 ...