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K7R163684B Datasheet(PDF) 9 Page - Samsung semiconductor |
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K7R163684B Datasheet(HTML) 9 Page - Samsung semiconductor |
9 / 19 page - 9 - Rev. 5.0 July 2006 512Kx36 & 1Mx18 QDRTM II b4 SRAM K7R163684B K7R161884B 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. 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 ↑ ) ↑ H H WRITE NOTHING ( K ↑ ) ↑ H H 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 H H H WRITE BYTE 0 ( K ↑ ) ↑ L H H H 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. 4. This signal was HIGH on previous K clock rising edge. Initiating consecutive READ or WRITE operations on consecutive K clock rising edges is not permitted. The device will ignore the second request. 5. If this signal was LOW to initiated the previous cycle, this signal becomes a don ′t care for this operation however it is strongly recommended that this signal is brought HIGH as shown in the truth table. K R W D Q OPERATION D(A1) D(A2) D(A3) D(A4) Q(A1) Q(A2) Q(A3) Q(A4) Stopped X X Previous state Previous state Previous state Previous state Previous state Previous state Previous state Previous state Clock Stop ↑ H H X X X X High-Z High-Z High-Z High-Z No Operation ↑ L4 XX X X X DOUT at C(t+1) DOUT at C(t+2) DOUT at C(t+2) DOUT at C(t+3) Read ↑ H5 L4 Din at K(t+1) Din at K(t+1) Din at K(t+2) Din at K(t+2) XX X X Write |
Similar Part No. - K7R163684B_06 |
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Similar Description - K7R163684B_06 |
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