參數(shù)資料
型號(hào)： LRS1805A
廠商： Sharp Corporation
英文描述： Stacked Chip 64M (x16) Flash Memory + 16M (x16) Smartcombo RAM
中文描述： 堆疊芯片64M號(hào)（x16）的閃存16M內(nèi)存（× 16）Smartcombo內(nèi)存
文件頁(yè)數(shù)： 39/57頁(yè)
文件大?。?/td> 1373K
代理商： LRS1805A
LRS1805A
37
14. Notes
This product is a stacked CSP package that a 64M (x16) bit Flash Memory and a 16M (x16) bit Smartcombo RAM are
assembled into.
- Supply Power
Maximum difference (between F-V
CC
and S-V
CC
) of the voltage is less than 0.3V.
- Power Supply and Chip Enable of Flash Memory and Smartcombo RAM (F-CE, S-CE
1
, S-CE
2
)
S-CE
1
should not be low and S-CE
2
should not be high when F-CE is low simultaneously.
If the two memories are active together, possibly they may not operate normally by interference noises or data
collision on DQ bus.
Both F-V
CC
and S-V
CC
are needed to be applied by the recommended supply voltage at the same time expect
Smartcombo RAM data retention mode.
- Power Up Sequence
When turning on Flash memory power supply, keep F-RST low. After F-V
CC
reaches over 2.7V, keep F-RST low for
more than 100 nsec.
- Device Decoupling
The power supply is needed to be designed carefully because one of the Smartcombo RAM and the Flash Memory is in
standby mode when the other is active. A careful decoupling of power supplies is necessary between
Smartcombo RAM and Flash Memory. Note peak current caused by transition of control signals (F-CE, S-CE
1
, S-CE
2
)
.
sharp
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