W958D6DB Datasheet, PDF (29/57 Pages) Winbond – Low-power features

W958D6DB
8.4.3.15 Latency Counter (Fixed Latency)
CLK
A [max :16]
ADV #
CE #
A/DQ[15:0 ]
( READ )
A/DQ[15:0 ]
( WRITE )
Valid
address
Valid
address
256Mb Async./Burst/Sync./A/D MUX
N-1
Cycles
Cycle N
t AA
tAADV
t CO
t ACLK
Valid
output
tSP tHD
Valid
output
Valid
Valid
input
input
Valid
output
Valid
input
Valid
output
Valid
input
Valid
output
Valid
input
Burst Identified
(ADV # =LOW)
Don t’ Care
Undefined
8.4.3.16 Operating Mode (BCR[15])
Default = Asynchronous Operation
The operating mode bit selects either synchronous burst operation or the default asynchronous mode of operation.
8.4.4 Refresh Configuration Register
The refresh configuration register (RCR) defines how the ADMUX PSRAM device performs its transparent self refresh.
Altering the refresh parameters can dramatically reduce current consumption during standby mode. At power-up, the
RCR is set to 0010h. The RCR is accessed with CRE HIGH and A[19:18] = 00b; or through the register access
software sequence with A/DQ = 0000h on the third cycle.
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Publication Release Date : June 27 ,2013
Revision : A01-003