M58LT128GS datasheet(69/98 Pages) STMICROELECTRONICS

69 / 98 page

M58LT128GST, M58LT128GSB

13 Part Numbering

69/98

Appendix A Block address tables

The following set of equations can be used to calculate a complete set of block addresses for

the M58LT128GST and M58LT128GSB using the information contained in Table 30 to Table 35.

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

− 3) / 16

Block_Number_Offset = Block_Number

− 3 − (Bank_Number x 16)

If Bank_Number = 0, the Block Base Address can be directly read from Table 30 and Table 33

(Parameter Bank Block Addresses) in the Address Range column, in the row that corresponds

to the given block number.

Otherwise:

Block_Base_Address = Bank_Base_Address + Block_Base_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 30 for the M58LT128GST and Table 33 for the

M58LT128GSB (Parameter Bank Block Addresses), in the Block Number column, in the row

that corresponds to the address given. Otherwise, the Block Number can be calculated using

the formulas below:

For the top configuration (M58LT128GST):

Block_Number = ((NOT address) / 2

16) + 3

For the bottom configuration (M58LT128GSB):

Block_Number = (address / 2

16) + 3

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

the following formulas:

Bank_Number = (Block_Number

− 3) / 16

Block_Number_Offset = Block_Number

−3 − (Bank_Number x 16)

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