HANBit
HSD16M64D16A
PIN FUNCTION DESCRIPTION
Pin
CLK
Name
System clock
Input Function
Active on the positive going edge to sample all inputs.
/CE
Chip enable
Disables or enables device operation by masking or enabling all inputs except
CLK, CKE and DQM
CKE
Clock enable
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.
CKE should be enabled 1CLK+tSS prior to valid command.
Row/column addresses are multiplexed on the same pins.
Row address : RA0 ~ RA11, Column address : CA0 ~ CA8
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.
A0 ~ A11
Address
BA0 ~ BA1 Bank select address
/RAS
/CAS
/WE
Row address strobe
Column address strobe Latches column addresses on the positive going edge of the CLK with CAS low.
Enables column access.
Write enable
Enables write operation and row precharge.
Latches data in starting from CAS, WE active.
DQM0 ~ 7 Data input/output mask Makes data output Hi-Z, tSHZ after the clock and masks the output.
Blocks data input when DQM active. (Byte masking)
DQ0 ~ 63
Vcc/Vss
Data input/output
Data inputs/outputs are multiplexed on the same pins.
Power and ground for the input buffers and the core logic.
Power supply/ground
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Voltage on Any Pin Relative to Vss
Voltage on Vcc Supply Relative to Vss
Power Dissipation
SYMBOL
VIN ,OUT
Vcc
RATING
-1V to 4.6V
-1V to 4.6V
16W
PD
o
o
Storage Temperature
TSTG
-55 C to 150 C
Short Circuit Output Current
IOS
50mA
Notes:
Permanent device damage may occur if " Absolute Maximum Ratings" are exceeded. Functional operation should be
restricted to the conditions as detailed in the operational sections of this data sheet. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
URL: www.hbe.co.kr
REV 1.0 (August.2002)
4
HANBit Electronics Co.,Ltd
HANBIT [ HANBIT ELECTRONICS CO.,LTD ]
