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1Gbit (32Mx32bit) Mobile SDR Memory
H55S1G(2/3)2MFP Series
BALL DESCRIPTION
SYMBOL
TYPE
DESCRIPTION
Clock : The system clock input. All other inputs are registered to the SDRAM on the
rising edge of CLK
CLK
INPUT
Clock Enable : Controls internal clock signal and when deactivated, the SDRAM will
be one of the states among power down, suspend or self refresh
CKE
CS
INPUT
INPUT
INPUT
Chip Select : Enables or disables all inputs except CLK, CKE, DQM0~DQM3
Bank Address : Selects bank to be activated during RAS activity
Selects bank to be read/written during CAS activity
BA0, BA1
For 2KBytes Page Size, Row Address : A0~A13 / Column Address : A0~A8
For 4KBytes Page Size, Row Address : A0~A12 / Column Address : A0~A9
Auto-precharge flag : A10
A0 ~ A13
INPUT
Command Inputs : RAS, CAS and WE define the operation
Refer function truth table for details
RAS, CAS, WE
DQM0 ~ DQM3
INPUT
INPUT
Data Mask:Controls output buffers in read mode and masks input data in write
mode
DQ0 ~ DQ31
VDD/VSS
VDDQ/VSSQ
NC
I/O
SUPPLY
SUPPLY
-
Data Input/Output:Multiplexed data input/output pin
Power supply for internal circuits
Power supply for output buffers
No connection
Rev 1.2 / Jun. 2008
7
HYNIX [ HYNIX SEMICONDUCTOR ]
