W164
4
Table 3. Byte Writing Sequence
Byte
Sequence
Byte Name
Bit Sequence
Byte Description
1
Slave Address
11010010
Commands the W164 to accept the bits in Data Bytes 3–6 for internal
register configuration. Since other devices may exist on the same com-
mon serial data bus, it is necessary to have a specific slave address for
each potential receiver. The slave receiver address for the W164 is
11010010. Register setting will not be made if the Slave Address is not
correct (or is for an alternate slave receiver).
2
Command
Code
Don’t Care
Unused by the W164, therefore bit values are ignored (“don’t care”). This
byte must be included in the data write sequence to maintain proper byte
allocation. The Command Code Byte is part of the standard serial com-
munication protocol and may be used when writing to another addressed
slave receiver on the serial data bus.
3
Byte Count
Don’t Care
Unused by the W164, therefore bit values are ignored (“don’t care”). This
byte must be included in the data write sequence to maintain proper byte
allocation. The Byte Count Byte is part of the standard serial communi-
cation protocol and may be used when writing to another addressed slave
receiver on the serial data bus.
4
Data Byte 0
Don’t Care
Refer to Cypress SDRAM drivers.
5
Data Byte 1
6
Data Byte 2
7
Data Byte 3
Refer to Table 4
The data bits in these bytes set internal W164 registers that control device
operation. The data bits are only accepted when the Address Byte bit
sequence is 11010010, as noted above. For description of bit control
functions, refer to Table 4, Data Byte Serial Configuration Map.
8
Data Byte 4
9
Data Byte 5
10
Data Byte 6
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