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M65KA128AL датащи(PDF) 21 Page - STMicroelectronics

номер детали M65KA128AL
подробное описание детали  128Mbit (4 Banks x 2M x 16) 1.8V Supply, Low Power SDRAMs
PDF  53 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M65KA128AL датащи(HTML) 21 Page - STMicroelectronics

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Register descriptions
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5.2
Extended Mode Register description
The Extended Mode Register is used to program Low Power self-refresh operation of the
device (PASR, DS, TCSR). It is used to select the area of the memory array refreshed
during Partial Array Self Refresh operations, and the driver strength.
It is loaded by issuing a Extended Mode Register Set command that programs A0 to A11
address bits. The values placed on the address lines are then latched into the Extended
Mode Register. BA0 and BA1 must be set to ‘0’ and ‘1’ respectively.
See Table 5: Extended Mode Register Definition, for more details.
Table 5.
Extended Mode Register Definition
Address
Bits
Mode
Register Bit
Register
Description
Value
Bit Description
A11-A10
-
-
00
A9
EMR9
Auto
Temperature
Compensated
Self Refresh
(ATCSR)
0
Enabled
1
Reserved
A8-A7
-
-
00
A6-A5
EMR6-EMR5
Driver Strength
Bits
00
Full Strength
01
1/2 Strength
10
1/4 Strength
11
1/8 Strength
A4-A3
EMR4-EMR3
00
A2-A0
EMR2-EMR0
Self Refresh
Area Bits
000
All Banks
001
Two Banks (BA1=0)
010
One Banks (BA0 and BA1 =0)
Other configurations reserved
BA1-BA0
-
-
10



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