tc59lm906amg TOSHIBA Semiconductor CORPORATION, tc59lm906amg Datasheet - Page 55

• Manufacturer Part Number: tc59lm906amg
• Description: Mos Digital Integrated Circuit Silicon Monolithic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Extended Mode Register Set for OCD Impedance adjustment
driven out by Network FCRAM. In drive (1) mode, all DQ, DQS signals are driven high and DQS signals are
driven low. In drive (0) mode, all DQ, DQS signals are driven low and DQS signals are driven high. In adjust
mode, BL=4 of operation code data must be used
OCD impedance adjust
burst code to Network FCRAM. For this operation, Burst Length has to be set to BL=4 via MRS command
before activating OCD and controllers must drive this burst code to all DQs at the same time. DT0 means all
DQ bits at bit time 0, DT1 at bit time 1, and so forth. The driver output impedance is adjusted for all DQs
simultaneously and after OCD calibration, all DQs of a given Network FCRAM will be adjusted to the same
driver strength setting. The maximum step count for adjustment is 16 and when the limit is reached, further
increment or decrement code has no effect.
Off-Chip Driver Program
diagram. For input data pattern for adjustment, DT0~DT3 is a fixed order and “not affected by MRS addressing
mode (i.e. Sequential or interleave).
Driver strength is controlled within the following range by OCD impedance adjustment.
To adjust output driver impedance, controllers must issue the ADJUST EMRS command along with a 4bit
For proper operation of adjust mode, WL=CL-1 clocks and t
OCD impedance adjustment can be done using the following EMRS mode. In drive mode all outputs are
SYMBOL
I
I
OH
OL
D
(DC)
(DC)
0
0
0
0
1
0
0
1
1
T0
Output Driver Output Sink DC Current for V
Full Strength
4bit burst code inputs to all DQs
Other Combinations
A9
D
0
0
0
1
1
0
0
0
1
1
1
0
0
T1
Output Source DC Current for V
V
V
DD
DD
A8
0
0
1
0
1
Q = 1.7V V
Q = 1.7V V
D
0
0
1
0
0
1
0
1
T2
PARAMETER
A7
0
1
0
0
1
OH
OL
= 0.280V
= 1.420V
D
0
1
0
0
1
0
1
0
T3
DD
Drive (1) DQ, DQS high and DQS low
Drive (0) DQ, DQS low and DQS high
DD
Q = 1.7V~1.9V
Q = 1.7V~1.9V
OCD calibration mode exit
Pull-up driver strength
OCD calibration default
NOP (No operation)
Decrease by 1 step
Decrease by 1 step
Decrease by 1 step
Increase by 1 step
Increase by 1 step
Increase by 1 step
Adjust mode
DS
Operation
NOP
NOP
/ t
DH
TC59LM914/06AMG-37,-50
should be met as the following timing
MIN
14.0
14.0
Operation
Reserved
MAX
18.7
Pull-down driver strength
18.7
NOP (No operation)
Decrease by 1 step
Decrease by 1 step
Decrease by 1 step
Increase by 1 step
Increase by 1 step
Increase by 1 step
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UNIT
mA
NOP
NOP
NOTES
Rev 1.0