RD38F2240WWYTQ0SB93 Micron Technology Inc, RD38F2240WWYTQ0SB93 Datasheet - Page 46

• Manufacturer Part Number: RD38F2240WWYTQ0SB93
• Manufacturer: Micron Technology Inc

Specifications of RD38F2240WWYTQ0SB93

• Operating Temperature (max): 85C
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Not Compliant

Figure 28: PSRAM Loading Configurations Registers Using Software Access
Figure 29: PSRAM Reading Registers Using Software Access
9.4.3
Datasheet
46
UB#/LB#
UB#/LB#
DQ[15:0]
DQ[15:0]
A[MAX:0]
A[MAX:0]
WE#
WE#
CE#
OE#
CE#
OE#
Cautionary Note About Software Register Access
To insure inadvertent access to the PSRAM registers during asynchronous operation,
the following two command sequences must be avoided when accessing the main
memory array. On the 3rd cycle of these command sequences, a write operation to the
main memory may be blocked and the software register access mode is accessible. To
prevent this, the two command sequences must be avoided except to access the
registers through the software method.
• To insure predictable device behavior, the fourth access cycle of the software access
should not be terminated or interrupted prematurely and ADV# should not go low
more than one time during each access where CE# is low
XXXXh
XXXXh
MAX
MAX
XXXXh
XXXXh
MAX
MAX
RCR: 0000h
BCR: 0001h
RCR: 0000h
BCR: 0001h
DIDR: 0002h
128-Mbit W18 Family with Synchronous PSRAM
MAX
MAX
Order Number: 311760-10
Output
Input
MAX
MAX
November 2007