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AS4C64M32MD2-25BCN Datasheet(PDF) 16 Page - Alliance Semiconductor Corporation

Part # AS4C64M32MD2-25BCN
Description  Deep Power Down Mode
PDF  129 Pages
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Manufacturer  ALSC [Alliance Semiconductor Corporation]
Direct Link  https://www.alliancememory.com
Logo ALSC - Alliance Semiconductor Corporation

AS4C64M32MD2-25BCN Datasheet(HTML) 16 Page - Alliance Semiconductor Corporation

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MR0 Device Information (MA <7:0> =00H) :
OP7
OP6
OP5
OP4
OP3
OP2
OP1
OP0
RFU
RZQI
(Optional)
RFU
DI
DAI
DAI(Device Auto-Initialization
Status)
Read-only
OP0
0B: DAI complete
1B: DAI still in progress
DI (Device Information)
Read-only
OP1
0B: S4 SDRAM
1B: Do Not Use
RZQI ( Built in Self Test for RZQ
Information)
Read -only
OP4:OP3
00B : RZQ self test not supported)
01B : ZQ-pin may connect to VDD2 or float
10B : ZQ-pin may short to GND
11B : ZQ-pin self test completed, no error
condition detected
(ZQ-pin may not connect to VDD2 or float nor
short to GND)
1
NOTE 1 RZQI, if supported, will be set upon completion of the MRW ZQ Initialization Calibration command.
NOTE 2 If ZQ is connected to VDD2 to set default calibration, OP[4:3] shall be set to 01. If ZQ is not connected to VDD2, either
OP[4:3]=01 or OP[4:3]=10 might indicate a ZQ-pin assembly error. It is recommended that the assembly error is corrected.
NOTE 3 In the case of possible assembly error (either OP[4:3]=01 or OP[4:3]=10 per NOTE 4), the LPDDR2 device will default
to factory trim settings for RON, and will ignore ZQ calibration commands. In either case, the system may not function as
intended.
NOTE 4 In the case of the ZQ self-test returning a value of 11b, this result indicates that the device has detected a resistor
connection to the ZQ pin. However, this result cannot be used to validate the ZQ resistor value or that the ZQ resistor tolerance
meets the specified limits (i.e., 240-ohm +/-1%).
AS4C64M32MD2-25BCN
AS4C128M16MD2-25BCN
Confidential
- 16/129 -
Rev.1.0 July 2016



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