25C320 MicrochipTechnology, 25C320 Datasheet
25C320
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25C320 Summary of contents
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... C - Automotive (E): - +125 C DESCRIPTION The Microchip Technology Inc. 25C320 is a 32K-bit serial Electrically Erasable PROM (EEPROM). The memory is accessed via a simple Serial Peripheral Interface (SPI) compatible serial bus. The bus signals required are a clock input (SCK) plus separate data in (SI) and data out (SO) lines ...
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... ELECTRICAL CHARACTERISTICS 1.1 Maximum Ratings* V ........................................................................ 7.0V CC All inputs and outputs w.r.t. V ....... -0. Storage temperature ............................ - 150 C Ambient temperature under bias.......... - 125 C Soldering temperature of leads (10 seconds) .................................................... +300 C ESD protection on all pins..................................... 4 kV *Notice: Stresses above those listed under ‘Maximum ratings’ ...
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... FIGURE 1-4: HOLD TIMING SCK SO n+2 n+1 n+2 n+1 SI HOLD 1996 Microchip Technology Inc don’t care high impedance n don’t care n Preliminary 25C320 t CSD t CLD t CSH lsb in t CSH t DIS lsb out n n n-1 DS21159B-page 3 ...
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... TABLE 1-3: AC CHARACTERISTICS Applicable over recommended operating ranges shown below unless otherwise noted 4.5V to 5.5V CC Commercial (C): Tamb = +70 C Industrial (I): Tamb = + +85C Automotive (E): Tamb = - +125 C Symbol Parameter f Clock Frequency SCK t CS Setup Time CSS t CS Hold Time CSH t CS Disable Time ...
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... BP1 BP0 The Write-In-Process (WIP) bit indicates whether the 25C320 is busy with a write operation. When set to a ‘1’ a write is in progress, when set to a ‘0’ no write is in progress. This bit is read only. 1996 Microchip Technology Inc. The Write Enable Latch (WEL) bit indicates the status of the write enable latch. When set to a ‘ ...
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... TABLE 2-2: WRITE PROTECT FUNCTIONALITY MATRIX WPEN WP WEL Low 0 1 Low 1 X High 0 X High 1 FIGURE 2-1: WRITE TO STATUS REGISTER AND/OR ARRAY FLOWCHART CS Returns High Write to Status Reg? WEL = low? No WPEN = 1? Write to Status Register Do not write to Status Register ...
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... The read operation is terminated by setting CS high (Figure 3-1). 3.3 Write Sequence Prior to any attempt to write data to the 25C320, the write enable latch must be set by issuing the WREN instruction (Figure 3-2). This is done by setting CS low and then clocking the proper instruction into the 25C320. After all eight bits of the instruction are trans- mitted, the CS must be brought high to set the write enable latch ...
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... FIGURE 3-1: READ SEQUENCE SCK instruction high impedance SO FIGURE 3-2: WRITE ENABLE SEQUENCE CS SCK SI SO FIGURE 3-3: WRITE SEQUENCE SCK instruction high impedance SO DS21159B-page ...
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... Preliminary 25C320 data byte data byte n (32 max ...
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... I/O line. 4.3 Serial Output (SO) The SO pin is used to transfer data out of the 25C320. During a read cycle, data is shifted out on this pin after the falling edge of the serial clock possible for the SI pin and the SO pin to be tied together ...
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... Product Identification System To order or to obtain information (e.g., on pricing or delivery), please use the listed part numbers, and refer to the factory or the listed sales offices. 25C320 - /P Package: Temperature Range: Device: Sales and Support Products supported by a preliminary Data Sheet may possibly have an errata sheet describing minor operational differences and recommended workarounds ...
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W ORLDWIDE AMERICAS Corporate Office Microchip Technology Inc. 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 602 786-7200 Fax: 602 786-7277 Technical Support: 602 786-7627 Web: http://www.microchip.com Atlanta Microchip Technology Inc. 500 Sugar Mill Road, Suite 200B Atlanta, GA 30350 ...