X25040 Xicor, X25040 Datasheet
X25040
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X25040 Summary of contents
Page 1
... PROM with Block Lock DESCRIPTION The X25040 is a CMOS 4096-bit serial E nally organized as 512 x 8. The X25040 features a Serial Peripheral Interface (SPI) and software protocol allow- ing operation on a simple three-wire bus. The bus signals are a clock input (SCK) plus separate data in (SI) and data out (SO) lines ...
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... When WP is held HIGH, all functions, including nonvola- tile writes operate normally. WP going LOW while CS is still LOW will interrupt a write to the X25040. If the internal write cycle has already been initiated, WP going LOW will have no affect on a write. ...
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... WIP are read-only and automatically set by other operations. The Write-In-Process (WIP) bit indicates whether the X25040 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. During a write, all other bits are set to “1”. ...
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... This is minimally a twenty-four clock operation. CS must go LOW and remain LOW for the duration of the operation. The host may continue to write bytes of data to the X25040. The only restriction is the 4 bytes must reside on the same page. If the address counter reaches the end of the page and the clock continues, the counter will “ ...
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... X25040 Operational Notes The X25040 powers-up in the following state: • The device is in the low power standby state. • A HIGH to LOW transition required to enter an active state and receive an instruction. • SO pin is high impedance. • The “write enable” latch is reset. ...
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... X25040 Figure 3. Write Enable Latch Sequence CS SCK SI SO Figure 4. Byte Write Operation Sequence SCK INSTRUCTION SI 8 9TH BIT OF ADDRESS HIGH IMPEDANCE HIGH IMPEDANCE BYTE ADDRESS ...
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... X25040 Figure 5. Page Write Operation Sequence SCK INSTRUCTION SI 8 9TH BIT OF ADDRESS SCK DATA BYTE Figure 6. Write Status Register Operation Sequence CS SCK SI HIGH IMPEDANCE ...
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... Units 3 mA 150 10 10 – –0 5V. CC Test 8 Limits X25040 5V 10% X25040 5.5V X25040-2.7 2.7 to 5.5V Test Conditions SCK = V x 0.1/V x 0.9 @ 1MHz Open OUT ...
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... X25040 EQUIVALENT A.C. LOAD CIRCUIT 2.16K OUTPUT 3.07K A.C. CHARACTERISTICS (Over recommended operating conditions, unless otherwise specified) Data Input Timing Symbol Parameter f Clock Frequency SCK t Cycle Time CYC CS Lead Time t LEAD CS Lag Time t LAG t Clock HIGH Time WH t Clock LOW Time ...
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... X25040 Serial Output Timing CS SCK MSB OUT ADDR SI LSB IN Serial Input Timing CS t LEAD SCK MSB IN HIGH IMPEDANCE CYC MSB–1 OUT LAG DIS LSB OUT 6451 FHD F09 LAG t FI LSB IN ...
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... X25040 Hold Timing CS SCK SO SI HOLD 6451 FHD F11 ...
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... X25040 PACKAGING INFORMATION HALF SHOULDER WIDTH ON ALL END PINS OPTIONAL 0.015 (0.38) TYP. 0.010 (0.25) NOTE: 1. ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 2. PACKAGE DIMENSIONS EXCLUDE MOLDING FLASH 8-LEAD PLASTIC DUAL IN-LINE PACKAGE TYPE P 0.430 (10.92) 0.360 (9.14) PIN 1 INDEX PIN 1 0.300 (7.62) REF. SEATING PLANE 0.150 (3.81) 0.125 (3.18) ...
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... X25040 PACKAGING INFORMATION 8-LEAD PLASTIC SMALL OUTLINE GULL WING PACKAGE TYPE S PIN 1 INDEX 0.010 (0.25) 0.020 (0.50) 0 – 8 0.016 (0.410) 0.037 (0.937) NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 0.150 (3.80) 0.158 (4.00) PIN 1 0.014 (0.35) 0.019 (0.49) 0.188 (4.78) 0.197 (5.00) (4X) 7 0.004 (0.19) 0.050 (1.27) 0.010 (0.25 0.0075 (0.19) 0.250" 0.010 (0.25) ...
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... Temperature Range Blank = Commercial = + Industrial = – + Military = – +125 C Package P = 8-Lead Plastic DIP S = 8-Lead SOIC X25040 X Blank = 8-Lead SOIC P = 8-Lead Plastic DIP X Blank = 10%, – + 5.5V + 5.5V, – + 2.7V to 5.5V + 2.7V to 5.5V, – ...