HYB18M512160BFX Datasheet, PDF (9/52 Pages) Qimonda AG – DRAMs for Mobile Applications 512-Mbit DDR Mobile-RAM

HYB18M512160BFX
512-Mbit DDR Mobile-RAM
Overview
1.4
Pin Definition and Description
Table 4 Pin Description
Ball
Type Detailed Function
CK, CK
Input Clock: CK and CK are differential clock inputs. All address and control inputs are
sampled on crossing of the positive edge of CK and negative edge of CK.
CKE
Input
Clock Enable: CKE HIGH activates and CKE LOW deactivates internal clock signals,
and device input buffers and output drivers. Taking CKE LOW provides precharge power-
down and self refresh operation (all banks idle), or active power-down (row active in any
bank). CKE must be maintained HIGH throughout read and write accesses. Input buffers,
excluding CK, CK and CKE are disabled during power-down. Input buffers, excluding
CKE are disabled during self refresh.
CS
Input Chip Select: All commands are masked when CS is registered HIGH. CS provides for
external bank selection on systems with multiple banks. CS is considered part of the
command code
RAS, CAS, Input Command Inputs: RAS, CAS and WE (along with CS) define the command being
WE
entered.
DQ0 - DQ15 I/O Data Inputs/Output: Bi-directional data bus (16 bit)
LDQS,
UDQS
I/O Data Strobe: output with read data, input with write data. Edge-aligned with read data,
centered with write data. Used to capture write data.
LDQS corresponds to the data on DQ0 - DQ7; UDQS to the data on DQ8 - DQ15.
LDM, UDM
Input
Input Data Mask: DM is an input mask signal for write data. Input data is masked when
DM is sampled HIGH coincident with that input data during a WRITE access. DM is
sampled on both edges of DQS. Although DM pins are input only, the DM loading
matches the DQ and DQS loading.
DM may be driven HIGH, LOW, or floating during READs.
LDM corresponds to the data on DQ0 - DQ7; UDM to the data on DQ8 - DQ15.
BA0, BA1
Input
Bank Address Inputs: BA0 and BA1 define to which bank an ACTIVATE, READ, WRITE
or PRECHARGE command is being applied. BA0, BA1 also determine which mode
register is to be loaded during a MODE REGISTER SET command (MRS or EMRS).
A0 - A12
Input
Address Inputs: Provide the row address for ACTIVE commands and the column
address and Auto Precharge bit for READ/WRITE commands, to select one location out
of the memory array in the respective bank. A10 (=AP) is sampled during a precharge
command to determine whether the PRECHARGE applies to one bank (A10=LOW) or all
banks (A10=HIGH). If only one bank is to be precharged, the bank is selected by BA0 and
BA1. The address inputs also provide the op-code during a MODE REGISTER SET
command.
V_DDQ
V_SSQ
V_DD
V_SS
N.C.
Supply I/O Power Supply: Isolated power for DQ output buffers for improved noise immunity:
V_DDQ = 1.70 V − 1.90 V
Supply I/O Ground
Supply Power Supply: Power for the core logic and input buffers, V_DD = 1.70 V − 1.90 V
Supply Ground
–
No Connect
Data Sheet
9
Rev. 1.10, 2006-11
04052006-4SYQ-ZRN3