HYB18H1G321AF Datasheet, PDF (14/48 Pages) Qimonda AG – GDDR3 Graphics RAM 1-Gbit GDDR3 Graphics RAM

Internet Data Sheet
HYB18H1G321AF–10/11/14
1-Gbit GDDR3
TABLE 7
Scan Pin Description
PACKAGE SYMBOL NORMAL TYPE DESCRIPTION
BALL
FUNCTION
V-9
SSH
RES
Input Scan Shift: Capture the data input from the pad at logic LOW and shift the
data on the chain at logic HIGH.
F-9
SCK
CS
Input Scan Clock: Not a true clock, could be a single pulse or series of pulses.
All scan inputs will be referenced to rising edge of the scan clock
D-2
SOUT
WDQS0
Output Scan Output
V-4
SEN
SEN
Input Scan Enable: Logic HIGH enables the device into scan mode and will be
disabled at logic LOW. Must be tied to GND when not in use.
A-9
SOE
MF
Input
Scan Output Enable: Enables (registered LOW) and disables (registered
HIGH) SOUT data. This pin will be tied to V_DD or GND through a resistor
(typically 1KΩ for normal operation. Tester needs to overdrive this pin to
guarantee the required input logic level in scan mode.
Notes
1. When SEN is asserted, no commands are to be executed by the GDDR3. This applies both to user commands and
manufacturing commands which may exist while RES is deasserted.
2. The Scan Function can be used right after bringing up V_DD / V_DDQ of the device. No initialization sequence of the device is
required. After leaving the Scan Function it is required to run through the complete initialization sequence.
3. In Scan Mode all terminations for CMD/ADD and DQ, DM, RDQS and WDQS are switched off.
4. In a double-load clam-shell configuration, SEN will be asserted to both devices. Separate two SOE’s should be provided to
top and bottom devices to access the scanned output. When either of the devices is in scan mode, SOE for the other device
which is not in a scan will be disabled.
Rev. 0.92, 2007-10
14
06122007-MW7D-3G3M