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M69KB128AA Datasheet(PDF) 29 Page - STMicroelectronics

Part # M69KB128AA
Description  128 Mbit (8Mb x16) 1.8V Supply, Burst PSRAM
PDF  68 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M69KB128AA Datasheet(HTML) 29 Page - STMicroelectronics

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M69KB128AA
7 Configuration registers
29/68
Figure 7.
Set Configuration Register (Software Method)
1.
Only the Bus Configuration Register (BCR) and the Refresh Configuration Register (RCR) can be modified.
2.
To program the BCR or the RCR on last bus write cycle, DQ0-DQ15 must be set to ‘0001h’ and ‘0000’ respectively.
3.
The highest order address location is not modified during this operation.
4.
The control signal E must be toggled as shown in the above figure.
Figure 8.
Read Configuration Register (Software Method)
1.
To read the BCR, RCR or DIDR on last bus read cycle, DQ0-DQ15 must be set to ‘0001h’, ‘0000’ and ‘0002’ respectively.
2.
The highest order address location is not modified during this operation.
3.
The control signal E must be toggled as shown in the above figure.
Addr.
7FFFFFh
E
G
W
LB, UB
AI09469f
7FFFFFh
7FFFFFh
7FFFFFh
DQ0-DQ15
(2)
Configuration
Register Data
tEHEL2
tEHEL2
tEHEL2
Addr.
7FFFFFh
E
G
W
LB, UB
AI09470f
7FFFFFh
7FFFFFh
7FFFFFh
DQ0-DQ15
(1)
Configuration
Register Data
tEHEL2
tEHEL2
tEHEL2



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