Datasheet

Commands – Truth Tables
Table 67: Truth Table – Command
Notes 1–5 apply to the entire table
Function Symbol
CKE
CS# RAS# CAS# WE#
BA
[2:0]
An A12 A10
A[11,
9:0]
Notes
Prev.
Cycle
Next
Cycle
MODE REGISTER SET MRS H H L L L L BA OP code
REFRESH REF H H L L L H V V V V V
Self refresh entry SRE H L L L L H V V V V V 6
Self refresh exit SRX L H H V V V V V V V V 6, 7
LH HH
Single-bank PRECHARGE PRE H H L L H L BA V V L V
PRECHARGE all banks PREA H H L L H L V V H V
Bank ACTIVATE ACT H H L L H H BA Row address (RA)
WRITE BL8MRS,
BC4MRS
WR H H L H L L BA RFU V L CA 8
BC4OTF WRS4 H H L H L L BA RFU L L CA 8
BL8OTF WRS8 H H L H L L BA RFU H L CA 8
WRITE
with auto
precharge
BL8MRS,
BC4MRS
WRAP H H L H L L BA RFU V H CA 8
BC4OTF WRAPS4 H H L H L L BA RFU L H CA 8
BL8OTF WRAPS8 H H L H L L BA RFU H H CA 8
READ BL8MRS,
BC4MRS
RD H H L H L H BA RFU V L CA 8
BC4OTF RDS4 H H L H L H BA RFU L L CA 8
BL8OTF RDS8 H H L H L H BA RFU H L CA 8
READ
with auto
precharge
BL8MRS,
BC4MRS
RDAP H H L H L H BA RFU V H CA 8
BC4OTF RDAPS4 H H L H L H BA RFU L H CA 8
BL8OTF RDAPS8 H H L H L H BA RFU H H CA 8
NO OPERATION NOP H H L H H H V V V V V 9
Device DESELECTED DES H H H X X X X X X X X 10
Power-down entry PDE H L L H H H V V V V V 6
HV V V
Power-down exit PDX L H L H H H V V V V V 6, 11
HV V V
ZQ CALIBRATION LONG ZQCL H H L H H L X X X H X 12
ZQ CALIBRATION SHORT ZQCS H H L H H L X X X L X
Notes:
1. Commands are defined by the states of CS#, RAS#, CAS#, WE#, and CKE at the rising
edge of the clock. The MSB of BA, RA, and CA are device-, density-, and configuration-
dependent.
8Gb: x4, x8, x16 DDR3L SDRAM
Commands – Truth Tables
108
Rev 2.0 June 2016
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