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K7R320982C Datasheet(PDF) 10 Page - Samsung semiconductor |
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K7R320982C Datasheet(HTML) 10 Page - Samsung semiconductor |
10 / 20 page 1Mx36 & 2Mx18 & 4Mx9 QDRTM II b2 SRAM - 10 - Rev. 1.1 August 2006 K7R323682C K7R321882C K7R320982C WRITE TRUTH TABLE(x18) Notes: 1. X means “Don ′t Care”. 2. All inputs in this table must meet setup and hold time around the rising edge of input clock K or K ( ↑ ). 3. Assumes a WRITE cycle was initiated. 4. This table illustrates operation for x18 devices. x9 device operation is similar except that BW controls D0:D8. K K BW0 BW1 OPERATION ↑ L L WRITE ALL BYTEs ( K ↑) ↑ L L WRITE ALL BYTEs ( K ↑) ↑ L H WRITE BYTE 0 ( K ↑) ↑ L H WRITE BYTE 0 ( K ↑) ↑ H L WRITE BYTE 1 ( K ↑) ↑ H L WRITE BYTE 1 ( K ↑) ↑ HH WRITE NOTHING ( K ↑) ↑ HH WRITE NOTHING ( K ↑) WRITE TRUTH TABLE(x36) Notes: 1. X means “Don ′t Care”. 2. All inputs in this table must meet setup and hold time around the rising edge of input clock K or K ( ↑ ). 3. Assumes a WRITE cycle was initiated. K K BW0 BW1 BW2 BW3 OPERATION ↑ LLLL WRITE ALL BYTEs ( K ↑ ) ↑ LLLL WRITE ALL BYTEs ( K ↑ ) ↑ L HHH WRITE BYTE 0 ( K ↑ ) ↑ L HHH WRITE BYTE 0 ( K ↑ ) ↑ H L H H WRITE BYTE 1 ( K ↑ ) ↑ H L H H WRITE BYTE 1 ( K ↑ ) ↑ H H L L WRITE BYTE 2 and BYTE 3 ( K ↑ ) ↑ H H L L WRITE BYTE 2 and BYTE 3 ( K ↑ ) ↑ HHHH WRITE NOTHING ( K ↑) ↑ HHHH WRITE NOTHING ( K ↑ ) TRUTH TABLES SYNCHRONOUS TRUTH TABLE Notes: 1. X means “Don ′t Care”. 2. The rising edge of clock is symbolized by ( ↑ ). 3. Before enter into clock stop status, all pending read and write operations will be completed. K R W D Q OPERATION D(A0) D(A1) Q(A0) Q(A1) Stopped X X Previous state Previous state Previous state Previous state Clock Stop ↑ H H X X High-Z High-Z No Operation ↑ L XX X DOUT at C(t+1) DOUT at C(t+2) Read ↑ X L Din at K(t) Din at K(t) X X Write |
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