EM639325
EtronTech
16 Clock Suspend Mode Exit / PowerDown Mode Exit command
When the internal CLK has been suspended, the operation of the internal CLK is reinitiated from
the subsequent cycle by providing this command (asserting CKE "HIGH", the command should be
NOP or deselect). When the device is in the PowerDown mode, the device exits this mode and all
disabled buffers are turned on to the active state. tXSR(min.) is required when the device exits from
the PowerDown mode. Any subsequent commands can be issued after one clock cycle from the end
of this command.
17 Data Write / Output Enable, Data Mask / Output Disable command (DQM = "L", "H")
During a write cycle, the DQM signal functions as a Data Mask and can control every word of the
input data. During a read cycle, the DQM functions as the controller of output buffers. DQM is also
used for device selection, byte selection and bus control in a memory system.
Rev. 2.1
17
Aug. /2015
ETRON [ ETRON TECHNOLOGY, INC. ]
