M12L32321A-2G Datasheet, PDF (2/28 Pages) Elite Semiconductor Memory Technology Inc. – JEDEC standard 3.3V ± 0.3V power supply

ESMT
FUNCTIONAL BLOCK DIAGRAM
CLK
CKE
Clock
Generator
Address
Mode
Register
Row
Address
Buffer
&
Refresh
Counter
CS
RAS
CAS
WE
Column
Address
Buffer
&
Refresh
Counter
M12L32321A (2G)
Bank B
Bank A
Sense Amplifier
Column Decoder
Data Control Circuit
DQM0~3
DQ
PIN FUNCTION DESCRIPTION
Pin
CLK
Name
System Clock
CS
Chip Select
CKE
Clock Enable
A0 ~ A10/AP Address
BA
Bank Select Address
RAS
Row Address Strobe
CAS
Column Address Strobe
WE
Write Enable
DQM0~3
Data Input / Output Mask
DQ0 ~ 31
VDD/VSS
Data Input / Output
Power Supply/Ground
VDDQ/VSSQ Data Output Power/Ground
NC/RFU
No Connection/
Reserved for Future Use
Input Function
Active on the positive going edge to sample all inputs.
Disables or enables device operation by masking or enabling all inputs except
CLK, CKE and DQM.
Masks system clock to freeze operation from the next clock cycle.
CKE should be enabled at least one cycle prior to new command.
Disable input buffers for power down in standby.
Row / column addresses are multiplexed on the same pins.
Row address : RA0 ~ RA10, column address : CA0 ~ CA7
Selects bank to be activated during row address latch time.
Selects bank for read/write during column address latch time.
Latches row addresses on the positive going edge of the CLK with RAS low.
Enables row access & precharge.
Latches column addresses on the positive going edge of the CLK with
CAS low.
Enables column access.
Enables write operation and row precharge.
Latches data in starting from CAS , WE active.
Makes data output Hi-Z, t_SHZ after the clock and masks the output.
Blocks data input when DQM active.
Data inputs/outputs are multiplexed on the same pins.
Power and ground for the input buffers and the core logic.
Isolated power supply and ground for the output buffers to provide improved
noise immunity.
This pin is recommended to be left No Connection on the device.
Elite Semiconductor Memory Technology Inc.
Publication Date : Jul. 2012
Revision : 1.0
2/28