Random access memory with page addressing mode
First Claim
1. An integrated circuit random access memory comprising a plurality of n internal bus lines for transferring n data bits in parallel to an array of n sense elements, each of said elements receiving a respective internal bus line, under control of a first read address and an associated read control signal, multiplex means having parallel inputs for receiving outputs from each of said n sense elements and for successively transmitting data bits of a plural-bit selection among said n data bits to a multiplexed output in a single-address page mode under control of successive selection signals associated with said first read address, buffering means for receiving said multiplexed output and buffering at least a final bit among said plural-bit selection, said memory allowing application of a second read address and associated second read control signal and at least one associated second selection signal for controlling transferral of at least one further data bit at said second read address to said multiplex means thereby effecting a multi-address page mode.
3 Assignments
0 Petitions
Accused Products
Abstract
In an integrated circuit random access memory internally a xn (n>1) organization is realized, that externally translates to a x1 organization. The n data bits read in parallel are successively and selectively activated and after multiplexing buffered in sequence. Upon buffering but not yet outputting the last data bit of a read address, the next read address may be applied. In this way a multi-address page mode or cross address nibble mode is realized. For writing, a resettable data input delay buffer maintains sufficient margin for both Tdh and Tdv in that any old data is deactivated before new data appears. In this way an equalization pulse no longer is required.
-
Citations
17 Claims
- 1. An integrated circuit random access memory comprising a plurality of n internal bus lines for transferring n data bits in parallel to an array of n sense elements, each of said elements receiving a respective internal bus line, under control of a first read address and an associated read control signal, multiplex means having parallel inputs for receiving outputs from each of said n sense elements and for successively transmitting data bits of a plural-bit selection among said n data bits to a multiplexed output in a single-address page mode under control of successive selection signals associated with said first read address, buffering means for receiving said multiplexed output and buffering at least a final bit among said plural-bit selection, said memory allowing application of a second read address and associated second read control signal and at least one associated second selection signal for controlling transferral of at least one further data bit at said second read address to said multiplex means thereby effecting a multi-address page mode.
- 2. An integrated circuit random access memory comprising a plurality of n internal bus lines for transferring n data bits in parallel to an array of n output sense elements, each element receiving a respective internal bus line under control of a first read address and an associated received read control signal, multiplex means for receiving n sense elements outputs and transmitting at least one selected data bit among said n data bits to a multiplexed output under control of a first selection signal associated with said first read address, buffering means for receiving said multiplexed output and buffering said selected data bit, said memory simultaneously allowing application of a second read address and associated second read control signal and at least two second selection signals for controlling transferral of at least two further data bits at said second read address to said multiplex means thereby effecting a cross-address nibble mode.
-
3. A static random access memory comprising a plurality of n≧
- 4 internal bus lines for transferring n data bits in parallel to an array of n output sense elements each each element receiving a respective internal bus line under control of first read address and an associated received read control signal, multiplex mean for receiving n sense element outputs and for successively transmitting data bits of a plural-bit selection among said n data bits to multiplexed output in a single-address nibble mode under control of successive selection signals associated with said first read address and latch buffering means for receiving said multiplexed output and transiently buffering any bit so selected, said memory thereupon allowing application of a second read address before terminating buffering of the last data bit accessed at said first read address.
- View Dependent Claims (17)
Specification