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The Hynix HYM71V16C735AT8 Series are 16Mx72bits ECC Synchronous DRAM Modules. The modules are composed of nine 16Mx8bits CMOS Synchronous DRAMs in 400mil 54pin TSOP-II package, one 2Kbit EEPROM in 8pin TSSOP package on a 168pin glass-epoxy printed circuit board. One 0.22uF and one 0.0022uF decoupling capacitors per each SDRAM are mounted on the PCB.
Four of the seven instructions end with the transmission of the instruction byte. The basic sequence is illustrated in Figure 3. These two-byte instructions exchange data between the Wiper Counter Register and one of the Data Registers. A transfer from a Data Register to a Wiper Counter Register is essentially a write to a static RAM. The response of the wiper to this action will be delayed tWRL. A transfer from the Wiper Counter Register (current wiper position), to a Data Register is a write to nonvolatile memory and takes a minimum of tWR to complete.
The Wiper Counter Register is a volatile register; that is, its contents are lost when the LM305AH is powered- down. Although the register is automatically loaded with the value in DR0 upon power-up, this may be different from the value present at power-down. Power- up guidelines are recommended to ensure proper loadings of the DR0 value into the WCR.