h55s1g32mfp-60 Hynix Semiconductor, h55s1g32mfp-60 Datasheet - Page 26

• Manufacturer Part Number: h55s1g32mfp-60
• Description: 32mx32bit Mobile Sdram
• Manufacturer: Hynix Semiconductor

DESELECT
The DESELECT function (CS = High) prevents new commands from being executed by the Mobile SDRAM, the Mobile
SDRAM ignore command input at the clock. However, the internal status is held. The Mobile SDRAM is effectively dese-
lected. Operations already in progress are not affected.
NO OPERATION
The NO OPERATION (NOP) command is used to perform a NOP to a Mobile SDRAM that is selected (CS = Low, RAS =
CAS = WE = High). This command is not an execution command. However, the internal operations continue. This pre-
vents unwanted commands from being registered during idle or wait states. Operations already in progress are not
affected. (see to next figure)
ACTIVE
The Active command is used to activate a row in particular bank for a subsequent Read or Write access. The value of
the BA0,BA1 inputs selects the bank, and the address provided on A0-A13(only for the 2KBytes page size. For the
4KBytes page size, A0~A12 are provided) selects the row. This row remains active (or open) for accesses until a PRE-
CHARGE command is issued to that bank. (see to next figure)
Rev 1.2 / Jun. 2008
CLK
CKE
CS
RAS
CAS
WE
A0~A13
BA0,1
(High)
NOP command
Don't Care
CLK
CKE
CS
RAS
CAS
WE
A0~A13
BA0,1
1Gbit (32Mx32bit) Mobile SDR Memory
(High)
ROW IN A SPECIFIC BANK
Bank Address
ACTIVATING A SPECIFIC
Row Address
H55S1G(2/3)2MFP Series
BA
RA
Don't Care
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