M58WR128EB datasheet(59/87 Pages) STMICROELECTRONICS

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M58WR128ET, M58WR128EB

APPENDIX A. BLOCK ADDRESS TABLES

The following set of equations can be used to calculate a complete set of block addresses using the infor-

mation contained in Tables 28, 29, 30, 31, 32 and 33.

To calculate the Block Base Address from the Block Number:

First it is necessary to calculate the Bank Number and the Block Number Offset. This can be achieved

using the following formulas:

Bank_Number = (Block_Number

− 7) / 8

Block_Number_Offset = Block_Number

− 7 − (Bank_Number x 8)

If the Bank_Number = 0, the Block Base Address can be directly read from Table 28 or Table 31 (Param-

eter Bank Block Addresses) in the Block Number Offset row. Otherwise:

Block_Base_Address = Bank_Base_Address + Block_Address_Offset

To calculate the Bank Number and the Block Number from the Block Base Address:

If the address is in the range of the Parameter Bank, the Bank Number is 0 and the Block Number can be

directly read from Table 28 or Table 31(Parameter Bank Block Addresses), in the row that corresponds to

the address given. Otherwise, the Block Number can be calculated using the formulas below:

For the top configuration (M58WR128ET):

Block_Number = ((NOT address) / 215) + 7

For the bottom configuration (M58WR128EB):

Block_Number = (address / 215) + 7

For both configurations the Bank Number and the Block Number Offset can be calculated using the fol-

lowing formulas:

Bank_Number = (Block_Number

− 7) / 8

Block_Number_Offset = Block_Number

− 7 − (Bank_Number x 8)

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