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MT28C6428P18 Datasheet(PDF) 7 Page - Micron Technology |
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MT28C6428P18 Datasheet(HTML) 7 Page - Micron Technology |
7 / 48 page 7 4 Meg x 16 Asynchronous/Page Flash 512K x 16 SRAM Combo Memory Micron Technology, Inc., reserves the right to change products or specifications without notice. MT28C6428P20_3.p65 – Rev. 3, Pub. 7/02 ©2002, Micron Technology, Inc. 4 MEG x 16 ASYNCHRONOUS/PAGE FLASH 512K x 16 SRAM COMBO MEMORY ADVANCE NOTE: 1. Two devices may not drive the memory bus at the same time. 2. Allowable Flash read modes include read array, read query, read configuration, and read status. 3. Outputs are dependent on a separate device controlling bus outputs. 4. Modes of the Flash and SRAM can be interleaved so that while one is disabled, the other controls outputs. 5. SRAM is enabled and/or disabled with the logical function: S_CE1# or S_CE2. 6. Simultaneous operations can exist, as long as the operations are interleaved such that only one device attempts to control the bus outputs at a time. 7. Data output on lower byte only; upper byte High-Z. 8. Data output on upper byte only; lower byte High-Z. 9. Data input on lower byte only. 10. Data input on upper byte only. TRUTH TABLE – FLASH FLASH SIGNALS SRAM SIGNALS MEMORYOUPUT MODES F_RP# F_CE# F_OE# F_WE# S_CE1# S_CE2 S_OE# S_WE# S_UB# S_LB# MEMORY DQ0–DQ15 NOTES BUS CONTROL Read H L L H SRAM must be High-Z Flash DOUT 1, 2, 3 Write H L H L Flash DIN 1 Standby H H X X Other High-Z 4 Output Disable H L H H SRAM any mode allowable Other High-Z 4, 5 Reset L X X X Other High-Z 4, 6 TRUTH TABLE – SRAM FLASH SIGNALS SRAM SIGNALS MEMORYOUPUT MODES F_RP# F_CE# F_OE# F_WE# S_CE1# S_CE2 S_OE# S_WE# S_UB# S_LB# MEMORY DQ0–DQ15 NOTES BUS CONTROL Read DQ0–DQ15 L H L H L L SRAM DOUT 1, 3 DQ0–DQ7 L H L H H L SRAM DOUT LB 7 DQ8–DQ15 Flash must be High-Z L H L H L H SRAM DOUT UB 8 Write DQ0–DQ15 L H H L L L SRAM DIN 1, 3 DQ0–DQ7 L H H L H L SRAM DIN LB 9 DQ8–DQ15 L H H L L H SRAM DIN UB 10 Standby H X X X X X Other High-Z 4 Flash any mode allowable X L X X X X Other High-Z 4 Output Disable L H X X X X Other High-Z 4 |
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