HYB18H512321AF
512-Mbit GDDR3
Boundary Scan
Table 10
Scan Pin Description
PACKAGE SYMBOL NORMAL TYPE
DESCRIPTION
BALL
FUNCTION
V-9
SSH
SCK
RES
Input
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
CS
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
V-4
SOUT
SEN
WDQS0
SEN
Output Scan Output
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 VDD 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 VDD / VDDQ 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.
Table 11
Scan DC Electrical Characteristics and Operating Conditions
PARAMETER/CONDITION
Input High (Logic 1) Voltage
Input Low (Logic 0) Voltage -
1) The parameter applies only when SEN is asserted.
2) All voltages referenced to GND.
SYMBOL
VIH(DC)
VIL(DC)
MIN
MAX
—
VREF-0.15 V
UNITS
NOTES
1)2)
V
REF+0.15
1) 2)
—
Data Sheet
25
Rev. 1.73, 2005-08
05122004-B1L1-JEN8
QIMONDA [ QIMONDA AG ]
